Best Lunch Containers for Adults: Top 10 Picks
Optimizing midday nutrition requires high-performance food storage solutions. For professionals and students alike, the best lunch containers for adults offer unparalleled functionality and durability.
Exploring the spectrum of available lunch boxes, from robust stainless steel models to leak-proof Bento-style selections, reveals sophisticated engineering aimed at preserving meal quality. These innovative containers are more than just vessels; they are essential tools for a health-conscious lifestyle.
Are you ready to elevate your lunchtime experience with the ultimate meal prep containers?
Find Your Perfect Packable Meal Companion
1. Bento Box Adult Lunch Box, Containers for Adults Men Women

Elevate your daily meals with this versatile Bento Box, designed for adults seeking a practical and stylish way to pack lunches. Offering ample space and intelligent organization, this lunch container ensures your food stays fresh, flavor-intact, and ready to enjoy wherever your day takes you.
This adult lunch box boasts a generous 1200ml capacity, thoughtfully divided into four compartments, perfect for portioning a balanced meal without flavor mingling. Constructed from robust, BPA-free PP plastic, it’s built for durability and safety, making it an ideal choice for work, school, or travel. Enjoy the convenience of microwave and dishwasher-safe components for effortless reheating and cleaning.
Enjoy the convenience of microwave and dishwasher-safe components for effortless reheating and cleaning.
Pros
- Complete Mealtime Solution: Receive an 8-in-one set including the brown bento lunch box, a spoon, fork, a dedicated sauce jar, and four silicone muffin liners, providing all necessary accessories for a satisfying meal.
- Advanced Leak-Proof Technology: Featuring an embedded silicone gasket and four secure locking buckles, alongside individual compartment seals, this bento lunch box guarantees a leak-proof seal, preventing spills in your bag.
- Food Separation & Flavor Preservation: The four distinct compartments are expertly designed to keep different foods separate, preserving their original tastes and textures for a more enjoyable dining experience.
- Durable & Safe Materials: Crafted from thickened, sturdy, and drop-resistant PP plastic, this lunch container is completely BPA-free, ensuring your food is packed safely and securely meal after meal.
- Convenient for Everyday Use: Both the container and lid are separable, allowing the container portion to be safely cleaned in the dishwasher, while the entire container unit (excluding the lid) is microwave-safe for easy meal reheating.
Cons
- Lid Not Microwave/Dishwasher Safe: While the container is microwave and dishwasher safe, the lid is not, requiring separate hand-washing and thus limiting full unit submersion in the dishwasher.
For adults seeking a reliable and compartmentalized food carrier, this bento lunch box offers a practical solution for enjoying homemade meals on-the-go. Its thoughtful design, durable construction, and included accessories make it a standout choice for portable dining, perfect for office lunches or picnic adventures.
2. Bentgo Classic – Adult Bento Box, Stackable 3-Compartment Lunch Box

Revolutionize your lunchtime with the Bentgo Classic Adult Bento Box, the ultimate all-in-one solution for delicious, organized meals on the go. Say goodbye to messy containers and forgotten cutlery; this stylish bento offers unparalleled convenience for busy professionals and anyone seeking a smarter way to pack their midday repast.
Designed for modern life, this stackable lunch box features three ample compartments to keep your food separate and appealing. Crafted from durable, food-safe materials with a minimalist aesthetic, it includes a built-in utensil set and a secure strap, ensuring everything stays neatly together. Its compact, space-saving design makes it perfect for work, travel, or any portable meal preparation.
Its compact, space-saving design makes it perfect for work, travel, or any portable meal preparation.
Pros
- All-in-One Convenience: Features three separate food compartments, a built-in utensil set (fork & spoon), and a sturdy elastic strap to secure the entire unit, eliminating the need for extra bags or loose containers for your packed lunch.
- Stylish & Eco-Friendly: Available in a range of modern colors, this reusable lunch box promotes sustainability by reducing single-use plastic waste and offers a chic alternative to traditional meal containers for adults.
- Smart & Space-Saving: The top container cleverly nests within the bottom one, allowing for compact storage at home or in your bag, making this an ideal solution for smaller kitchens or minimalist packers.
- Durable & Portable: Constructed for daily use, this lunchbox is both lightweight and robust, making it easy to carry in backpacks or work bags without adding unnecessary bulk to your commute.
- Easy Meal Prep & Cleaning: The main containers are microwave and dishwasher safe (top rack recommended), simplifying reheating and cleanup, while the removable tray divider allows for portion control and customization of your meals.
Cons
- The lid, divider, and strap are not microwave or dishwasher safe and require handwashing, adding a minor step to the cleaning process for these specific components.
The Bentgo Classic Adult Bento Box is an excellent choice for individuals seeking a practical, stylish, and eco-conscious way to pack their meals. Whether you’re prepping healthy lunches for the week or simply need a reliable container for your daily on-the-go dining, this all-in-one lunch solution streamlines your routine.
3. Rubbermaid Brilliance Meal Prep Containers, 2-Compartment Food Storage Containers, 2.85

Revolutionize your meal prep and lunchtime experience with the Rubbermaid Brilliance Meal Prep Containers. Designed for adults seeking practical and stylish food storage solutions, these containers offer unmatched clarity, durable construction, and leakproof reliability, making them the perfect choice for healthy eating on the go.
Crafted from premium StainShield plastic, these 85-cup containers boast crystal-clear lids and bases, allowing for effortless identification of contents. Their stain and odor-resistant properties ensure your food tastes fresh and your containers remain pristine, while the 100% leakproof and airtight seal with secure latches guarantees zero spills, whether you’re carrying lunch to the office or storing leftovers.
Their stain and odor-resistant properties ensure your food tastes fresh and your containers remain pristine, while the 100% leakproof and airtight seal with secure latches guarantees zero spills, whether you’re carrying lunch to the office or storing leftovers. Built-in vents facilitate splatter-resistant microwaving, and the smart lid system ensures interchangeability with other Brilliance containers.
Pros
- Exceptional Clarity and Durability: The StainShield plastic offers crystal-clear visibility of your meals and resists stains and odors, keeping the containers looking new for longer. This makes it easy to see your perfectly portioned meals at a glance.
- Guaranteed Leakproof and Airtight: Travel with confidence thanks to the secure latches and leakproof seal that prevent any accidental spills or air from entering, preserving the freshness of your food. These are ideal for busy commuters and anyone who packs a lunch.
- Smart Meal Prep Design: The two-compartment system makes it simple to organize main dishes and sides separately, promoting balanced eating and simplifying your daily routine. It’s an essential accessory for anyone practicing healthy eating habits or portion control.
- Convenient Microwave Use: Integrated vents allow for safe and convenient microwaving with the lid on, minimizing mess and ensuring your meals are heated evenly without needing to remove the lid entirely.
- Versatile Lidding System: Lids are designed to fit across same-size Brilliance containers of all material types, offering flexibility and simplifying storage when not in use.
Cons
- Capacity Limitation for Large Meals: The 2.85-cup capacity might be restrictive for individuals who prefer larger single-compartment meals or require more space for bulky food items.
The Rubbermaid Brilliance 2-Compartment Meal Prep Containers are an excellent investment for adults seeking reliable, clear, and division-friendly lunch storage. They offer a superior solution for anyone looking to upgrade their on-the-go dining or kitchen organization with durable, easy-to-use food containers that simplify meal planning and transport.
4. Caperci Large Salad Container Bowl for Lunch – Better Adult

Elevate your midday meal with the Caperci Large Salad Container Bowl, meticulously designed for adults seeking a stylish and practical solution for packed lunches. This spacious salad keeper ensures your greens and toppings remain fresh and separate, transforming your daily lunch into a vibrant and delicious experience.
Engineered with an upgraded leak-proof design, this bento-style salad container boasts an airtight seal and secure locking clips, guaranteeing no spills during transit. Its thoughtful construction, featuring a dedicated 5-compartment tray and an integrated dressing holder, makes it an ideal choice for portion-controlled gourmet salads and healthy meal prepping.
Pros
- Superior Leak-Proof Performance: Features a food-grade silicone sealing ring and enhanced locking clips to confidently prevent leaks and keep your meals fresh, making it a top-tier lunchbox for adults on the go.
- Intelligent Compartmentalization: The innovative 5-compartment tray elegantly separates salad ingredients and toppings, maintaining their crispness, with a dedicated 3-oz leak-proof dressing container, a standout feature of this adult lunch solution.
- Generous Capacity & Versatile Use: Boasting a large 68-oz capacity, this salad bowl easily accommodates substantial portions of fruits, vegetables, and grains, functioning as a robust meal prep container or a portable salad box for work.
- Durable, BPA-Free Materials: Constructed from high-quality food-grade polypropylene and silicone, guaranteeing safety without BPA, vinyl, lead, or PVC, reinforcing its status as a healthy and reliable adult food container.
Cons
- Not Suitable for Young Children: Explicitly marked as not for children under 3 years old due to small parts, indicating its primary design focus is for adult users and professionals.
The Caperci Large Salad Container Bowl is an exceptional choice for adults prioritizing freshness, organization, and style in their portable meals. With its robust build and user-friendly features, it stands out as one of the best lunch containers for adults seeking a superior meal prep and on-the-go dining experience.
5. Bentgo Prep – 20-Piece 1-Compartment Reusable Meal Prep Containers with

Discover the ultimate solution for your meal prep needs with the Bentgo Prep 20-Piece 1-Compartment Reusable Meal Prep Containers. Awarded the #1 Brand Pick for meal prep containers, this set offers unparalleled convenience for busy adults seeking healthy, portion-controlled meals on the go. Experience a smarter way to pack lunches and manage your diet.
This comprehensive set features ten 4-cup capacity containers, each with embossed measurements for precise portioning. The durable, leak-resistant design, crafted from PFAS- and BPA-free materials, ensures your food stays fresh and organized.
Ideal for work lunches, gym snacks, or travel, these reusable containers are a sustainable alternative to disposables.
Pros
- Portion Control Perfection: Each 4-cup container features embossed measurements, simplifying balanced meal planning and supporting dietary goals for adult lunch prep.
- Durable & Safe Materials: Constructed from robust, PFAS- and BPA-free plastics, these single-compartment containers are designed for long-term, repeated use, promoting eco-friendly habits.
- Versatile Convenience: Microwave, freezer, and top-shelf dishwasher safe (lids hand-wash recommended) for effortless heating, storage, and cleaning, making them perfect meal prep boxes for adults.
- Stackable Organization: Clear, custom-fit lids ensure airtight storage, keeping your prepared meals fresh while allowing for neat stacking in refrigerators or pantries, streamlining food storage.
- Excellent Value Pack: This 20-piece set, including 10 trays and 10 lids, provides ample containers for a week’s worth of meals, offering a cost-effective solution for adult lunch containers.
Cons
- Lids are recommended to be hand-washed for optimal longevity and seal integrity, which may be a slight inconvenience for some users.
Elevate your healthy eating routine with the Bentgo Prep 20-Piece Meal Prep Containers. Their smart design, durable build, and focus on portion control make them an essential tool for any adult committed to balanced nutrition and convenient meal solutions.
Organize your week, reduce waste, and enjoy delicious, homemade meals wherever you go.
6. Bentgo Salad Container – 54 oz Bowl with 4-Compartment Toppings

Elevate your lunchtime experience with the Bentgo Salad Container, the ultimate solution for adults seeking convenient, fresh, and customizable meal prep. Say goodbye to soggy salads and hello to vibrant, organized meals, whether you’re heading to the office, gym, or enjoying an outdoor adventure.
This innovative 54 oz salad bowl is meticulously designed to keep all your ingredients perfectly separated until you’re ready to eat. Featuring a smart four-compartment tray for toppings, a leak-proof sauce container, and an included reusable fork, it’s the ideal companion for healthy adults on the go. Its durable, BPA-free construction ensures safety and longevity, making it a top choice among meal prep containers and adult lunch boxes.
Pros
- Superior Freshness Preservation: The airtight lid and secure locking clips, combined with the separate compartment tray and dedicated sauce container, prevent ingredients from becoming soggy, ensuring your salad stays crisp and delicious throughout the day.
- Versatile Meal Preparation: Effortlessly pack a complete meal with various toppings, dressings, and your main salad base. This bento-style container is perfect for more than just salads, accommodating pasta dishes, grain bowls, and other healthy lunch ideas for adults.
- Convenient and Safe Design: All components are dishwasher safe for easy cleanup, and the main bowl is microwave safe for reheating warm meals. Constructed from BPA-free, food-grade materials, it offers a safe and reusable alternative to disposable containers, positioning it as a responsible choice for your daily meals.
- All-in-One Portability: The integrated reusable fork and cutlery cover mean you have everything you need for a satisfying meal, eliminating the need for extra utensils. It’s a standout among portable lunch solutions and practical bento boxes for work.
Cons
- Compartment Size Limitations: While the four-compartment tray is excellent for smaller toppings, larger salad ingredients or sides might require consolidation or a separate container, which could be a minor inconvenience for those packing an extensive variety.
The Bentgo Salad Container redefines the adult lunch box, offering unparalleled organization and freshness for your midday meals. It’s an excellent investment for anyone prioritizing healthy eating and convenient meal transport, proving itself as one of the best lunch containers for adults seeking both style and function.
7. Bento Box Adult Lunch Box – 4 Pack, 5 –

Upgrade your midday meal with this 4-pack of vibrant bento lunch boxes, designed for adults and kids alike. Crafted from durable, eco-friendly wheat straw material, these containers offer a stylish and practical solution for packing balanced, on-the-go meals. Enjoy delicious variety and easy organization with every lunch.
Each bento lunch box features five intelligently designed compartments, perfect for portioning your main course, sides, snacks, and fruits. The lightweight, stackable design makes them ideal for refrigerators, cabinets, or your daily commute, encouraging healthier eating habits wherever you go. This set of 4 ensures you’re always prepared.
This set of 4 ensures you’re always prepared.
Pros
- Reusable & Eco-Friendly: Made from high-quality wheat straw material and BPA-free PP, offering a sustainable alternative to disposable containers, and a pack of 4 provides great value for family meal prep.
- User-Friendly Design: Features easy-open “cat ear” handles on the transparent lid, allowing effortless access for all ages, while the clear top lets you see your appetizing meal at a glance.
- Ideal for Balanced Meals: The multi-compartment design with 5 sections (including a 6-gallon capacity for the largest section) effectively separates food items like sandwiches, salads, fruits, and snacks, preventing flavors from mixing.
- Convenient & Versatile: Lightweight and stackable, these meal prep containers are perfect for work, school, or travel. They are microwave, freezer, and dishwasher safe (hand wash lid to prevent deformation).
Cons
- Not Leakproof: Designed for dry foods and single items, these bento boxes are not recommended for liquid items like soups or sauces to avoid spills.
These attractive, macaron-colored bento lunch boxes are an excellent choice for anyone seeking a practical and organized way to pack lunches. They are a fantastic addition to your kitchenware for everyday use, whether packing a child’s school lunch or an adult’s work meal, promoting healthier eating with ease.
8. Hydro Flask Food Jar – Insulated Stainless Steel, Snack Travel

Elevate your midday meal with the Hydro Flask Food Jar – your perfect companion for hot or cold culinary adventures. This 12 oz.
Engineered for convenience, this compact lunch container boasts TempShield™ insulation to keep meals piping hot or refreshingly cold for hours. Crafted from durable, pro-grade stainless steel, it guarantees pure taste without flavor transfer, while the soft-grip, leakproof lid promises worry-free transport, ensuring this is the best lunch container for adults on the go.
Pros
- Exceptional temperature retention for hours, keeping hot foods hot and cold foods cold, ideal for packed lunches and snacks.
- Durable, leakproof design with pro-grade stainless steel construction ensures no flavor transfer and prevents messy spills during commutes or outdoor excursions.
- Easy-grip lid simplifies opening and closing, making it a user-friendly option for all ages and a reliable reusable food container.
- Dishwasher safe for effortless cleaning, ensuring your insulated food jar is always ready for your next meal prep.
Cons
- Capacity may be smaller than larger bento boxes or multi-compartment meal prep containers for those needing to pack more substantial portions.
The Hydro Flask Food Jar is the ultimate choice for adults prioritizing quality, convenience, and taste in their portable meals. Whether packing a hearty soup or a fresh salad, this insulated travel companion ensures your food is enjoyed at its best, making it a top-tier option among insulated lunch containers for adults.
9. Ello Duraglass 3.4 Cup Meal Prep Sets 10Pc, 5 Pack

Elevate your daily dining with the Ello Duraglass 10-Piece Meal Prep Set, designed for adults seeking stylish, healthy, and convenient food storage solutions. This collection offers a superior alternative to disposable containers, promoting conscious eating and reducing waste.
Experience the durability and clarity of high-quality tempered glass with these 4-cup food containers. The Ello Duraglass set is your perfect companion for preparing nutritious lunches, storing leftovers, or packing snacks, ensuring freshness and convenience for your busy lifestyle.
These meal prep containers are built to last.
Pros
- Generous 5-Pack Set: Receive five 3.4-cup glass food containers, each paired with a BPA-free locking lid, providing ample space for diverse meal portions and making it one of the best lunch containers for adults.
- Stain and Odor Resistant Duraglass: Crafted from premium tempered glass, these containers are naturally resistant to stains and lingering odors from previous meals, simplifying cleanup and maintaining food purity.
- Leak-Proof and Airtight Seal: The innovative snap-on lids create a secure, airtight, and leak-proof seal, preventing spills in your bag and ensuring your food stays fresh from preparation to consumption.
- Versatile Heating and Storage: Enjoy the convenience of oven and microwave-safe containers (lid removed) for reheating, and freezer-safe storage for advanced meal planning.
- Protective and Stylish Sleeves: Each container features a removable, extra-thick silicone sleeve that not only adds a pop of color but also protects against chips and breaks, is dishwasher safe, and enhances grip.
Cons
- While the lids are top-rack dishwasher safe, hand-washing the lids is recommended for optimal longevity of the airtight seal.
The Ello Duraglass 10-Piece Meal Prep Set is an excellent choice for individuals prioritizing health, convenience, and sustainability in their meal prep routines. With their robust construction and thoughtful design, these glass food storage containers are a smart investment for your kitchen and your well-being.
10. Sinnsally Bento Box Adult Lunch Box with Compartments for Women

Elevate your daily meals with the Sinnsally Bento Box, the perfect lunch solution designed for style-conscious adults. This eye-catching, stackable lunch container brings a fresh, modern take on traditional Japanese bento boxes, ensuring your food is not only portable but also presented beautifully. It’s an ideal choice for anyone seeking functional and fashionable meal prep containers.
It’s an ideal choice for anyone seeking functional and fashionable meal prep containers.
Crafted from safe, BPA-free, food-grade materials, this 1400ml bento box keeps your food fresh and odor-free, making it a healthy option for both adults and kids. The thoughtful layered design prevents food from mixing, preserving individual flavors, while the leak-proof construction eliminates worries about spills during commutes. It’s a versatile meal prep container suitable for work, school picnics, fitness goals, or simple food storage.
Pros
- Healthy & Safe Materials: Constructed from durable, BPA-free, food-grade materials, ensuring a safe and healthy dining experience for you and your family.
- Smart Compartmentalized Design: Features stackable compartments that effectively separate different food items, maintaining distinct flavors and textures – a standout among adult lunch containers.
- Convenient & Practical: Includes a bonus sauce container with a lid and a cutlery set, plus it’s microwave (food containers only), dishwasher (excluding lid & band), and freezer safe for ultimate convenience in meal prep and general food storage.
- Leak-Proof Assurance: Engineered with a secure, leak-proof design to prevent messy spills, making it one of the most reliable meal prep boxes for on-the-go lifestyles.
- Stylish & Functional: Offers a chic, modern aesthetic that reinterprets the classic Japanese lunch box style, making it a fashionable choice for portable meals beyond typical food carriers.
Cons
- The top lid, elastic band, and cutlery set are not dishwasher or microwave safe, requiring separate hand washing and care to preserve their integrity.
The Sinnsally Bento Box is an excellent investment for adults seeking a practical, stylish, and healthy way to transport their meals. Its robust construction, thoughtful compartments, and leak-proof features make it a top contender among the best lunch containers for adults looking for a superior meal prep or food storage solution.
How to Choose the Best Lunch Containers for Adults
Material durability
A lunch box’s material durability is paramount for sustained daily use and value.
Investing in a well-constructed food carrier means it can withstand the rigors of commutes, office environments, and frequent washing without degrading. This translates to better protection for your meals and a longer lifespan for your investment, avoiding the need for frequent replacements.
Consider the resilience of options like robust stainless steel, which offers excellent resistance to dents and scratches, or shatterproof glass, providing a superior barrier against odors. High-quality BPA-free plastic containers are also designed for longevity, though their scratch resistance may vary.
Crucially, the integrity of the leakproof seal is a direct indicator of overall material quality and construction, preventing unwanted spills and preserving food freshness. Ultimately, the ability of a container to hold up against daily wear and tear ensures consistent performance and justifies its cost over time.
Capacity compartmentalization
The volume and arrangement of internal spaces within your meal carrier are paramount to supporting your dietary habits and culinary preferences.
This factor dictates your ability to manage portion sizes effectively and to pack a diverse range of food items, from your main course to accompanying sides and even small snacks. An improperly sized container might lead to overpacking, underpacking, or the undesirable mixing of flavors.
Consider whether your typical meal consists of a single, large item or a combination of distinct components. For those who enjoy variety or need to separate different food groups for freshness or dietary reasons, multicompartment designs are ideal. These segregated sections are perfect for keeping dressings separate from salads, or ensuring cookies don’t absorb moisture from fruit.
These segregated sections are perfect for keeping dressings separate from salads, or ensuring cookies don’t absorb moisture from fruit. Alternatively, a single, larger compartment provides ample room for hearty appetites or meals that are meant to be cohesive, like a generous stew or a substantial pasta dish. Ultimately, the overall capacity needs to suit your hunger levels – whether you require a compact carrier for a light lunch or a more generously sized one for a truly filling midday meal.
Ease of use maintenance
Effortless operation and upkeep significantly enhance the daily experience of meal portability.
These factors determine how seamlessly your food storage solution integrates into a busy lifestyle, saving precious time and reducing frustration.
Consider containers that are both microwave and dishwasher safe for ultimate convenience, allowing for quick reheating directly in the vessel and simple cleanup. Look for lid mechanisms that are intuitive and secure, whether they snap, clip, or twist shut, ensuring a leak-proof seal without a struggle.
Prioritizing models that offer quick and easy cleaning procedures, such as wide openings that allow for thorough scrubbing or materials that resist staining and odor absorption, guarantees your meal organizer remains hygienic and ready for the next use.
Temperature retention insulation
Maintaining optimal food temperature is paramount for enjoyable and safe meals away from home.
The ability of your meal carrier to retain heat or cold is what transforms leftovers from disappointing to delicious and ensures that chilled salads or yogurts remain refreshing throughout the day. Insulated designs, often featuring double-walled vacuum construction or thick foam layers, create a thermal barrier, significantly outperforming noninsulated alternatives.
Consider the duration you need to maintain a specific temperature. For example, a soup intended to be steaming hot at lunchtime will perform best in a high-quality vacuum-insulated thermos. Conversely, a container for a cold pasta salad benefits from features that prevent temperature transfer.
While noninsulated options are simpler and often more affordable, their effectiveness is limited to very short periods or accompanying separate cooling elements like gel packs. Therefore, investing in a well-insulated food carrier is key to consistent food enjoyment and safety, whether you are packing a breakfast burrito or a refreshing fruit salad.
Quick Best Lunch Containers For Adults Buying Checklist
- Assess Your Needs: Consider portion sizes and daily meal types.
- Prioritize Materials: Opt for durable, food-safe options like stainless steel or BPA-free plastics.
- Check for Leaks: Ensure a secure, leak-proof seal for worry-free transport.
- Evaluate Compartments: Decide if separate sections are needed for different foods.
- Ease of Cleaning: Look for dishwasher-safe and easy-to-disassemble containers.
- Insulation Matters: Determine if temperature retention is a key requirement for your meals.
Frequently Asked Questions
What Are The Best Materials For Adult Lunch Containers?
Stainless steel, glass, and BPA-free plastics are popular choices, offering durability and food safety.
How Important Are Leak-Proof Seals?
Leak-proof seals are crucial to prevent spills and keep your bag clean while transporting meals.
Should I Choose A Container With Compartments?
Compartments are great for keeping different foods separate and can help with portion control.
Are Insulated Lunch Containers Worth The Investment?
Yes, if you want to keep hot foods warm or cold foods chilled for extended periods without a fridge.
How Do I Ensure My Lunch Container Is Easy To Clean?
Look for containers that are dishwasher-safe or have wide openings and removable parts for simple hand washing.
Final Words
Investing in the right lunch container can transform your daily meals, making healthy eating on the go convenient and enjoyable. Prioritizing material, features, and ease of use ensures your best lunch container for adults becomes a reliable companion.
