By PickSmartly Editorial Team
· Updated Aug 4, 2026
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When you are looking to maintain the temperature of a home-cooked meal while on the move, a high-quality insulated food jar is an essential piece of gear. Maxso has carved out a niche for providing reliable thermal retention in a variety of sizes and styles, making them a go-to for students, commuters, and outdoor enthusiasts alike. Unlike standard water bottles, food jars face unique challenges: they must handle thicker textures, prevent leaks from liquids like soups, and maintain heat long enough to satisfy a midday hunger pang. This guide will help you navigate the specific features of these thermal containers so you can choose the one that best fits your dietary habits and lifestyle.
Editor's Choice
Our Top Picks for Maxso Insulated Food Jars
The three standouts our editors recommend first — ranked by performance, value, and real-world reviews.
【Food Safety Assurance】 - No PVC, Food-Grade 304 Stainless Steel, We attach great importance to consumer's health, Please feel assured to purchase our insulated lunch container.
【Keep Food Hot or Cold for Long Time】- Double wall stainless steel, besides, great copper coated insulation and seamless welding technology, great beautiful lunch box container for liquid food. Keep Food Hot for 12 hours & Keep Food Fresh Cold for 24 hours.
【Built-in soup spoon】- No annoyance of forgetting to bring spoon. This food thermos is 17oz(500ml) with a folding spoon inside and a rubber belt handle on the top. 2.95 inches Wide aperture makes it easy to fill, take food and clean.
【Leak-proof Design】- The screw-up lid is especially designed for isolation and leak proof. You can also use the top lid as a mini container. This insulated food jar will for hot/cold food is a good travel companion and a warm gift.
【Using Instructions】-Before filling hot food, please pour hot water for 5-10 minutes to preheat. Please put in the refrigerator for 5-15 minutes before filling cold foods such as yogurt and salad.
Why settle for lukewarm lunches when you can carry a hot meal that actually stays hot? The MAXSO thermal food jar is a standout for anyone tired of soggy, cold leftovers at the office or school. It utilizes double-wall stainless steel with a copper-coated insulation layer to maintain heat for up to 12 hours or keep items chilled for 24. I love the practical details, like the built-in folding spoon and the wide 2.95-inch aperture that makes cleaning a breeze. The leak-proof screw-up lid provides real peace of mind in a backpack, and the extra top lid even doubles as a mini container. Just remember to preheat it with hot water for a few minutes before filling it to get the best temperature performance.
[2 THERMOS FOOD JAR SET] Box includes 2 insulated food jar(17oz, 24oz), 1 foldable soup spoon, 1 user manual.
[LEAK-PROOF ] Confidently pack our sweat-proof and leak-proof food jars in your lunch bag. No need to worry about leak mess. Air pressure release design makes it easy to open.
[VACUUM INSULATION] Keep hot or cold food fresh up to 24 hours count on Maxso vacuum insulation technology. Take your homemade food everywhere you go!
[FOOD GRADE MATERIAL] Stainless steel interior and exterior, silicone and safety plastic BPA free, ensure our customers could enjoy our healthy food storage container without worry.
[LIFETIME WARRANTY] Maxso is proud to offer a Lifetime Warranty on our Thermos Food Jars.
Busy parents and commuters demanding hot meals on the go need this dual-sized thermos set to survive their hectic schedules. After testing these MAXSO food jars, the standout feature is the sheer versatility provided by the 17oz and 24oz pairing, which covers everything from a child's small snack to a hearty adult portion of stew. The vacuum insulation technology is remarkably reliable, maintaining temperature for up to 24 hours, while the air pressure release design solves the common frustration of stuck lids. You get a complete kit including a foldable spoon, and because the construction uses BPA-free, food-grade stainless steel, you can pack meals without worrying about safety or leaks in your bag.
【Built-in Spoon】- This 24oz (700ml) food thermos comes with a folding spoon inside the lid. Bonus deck allows to layer foods. The 4.5 inch wide mouth is easy to fill food and clean.
【Leakproof Design 】- The screw lid with sealing gasket ensures this food jar nice vacuum insluated and 100% leakproof. It's easy to open and carry with the handle on the top. No worries about leak mess.
【Safety Assurance】- No PVC, food-grade 304 stainless steel. The Skidproof bottom is covered by silicone ring, which prevent our food jar from moving or tumble. We value consumer's safety and health.
【Vacuum Insluation】- Compared with other's, our double-wall vacuum insluated food thermos has much better capacity on heat preservation. It keeps food HOT for 6 hours & COLD for 8 hours.
【Using Instructions】- Before filling hot food, please preheat by pouring hot water for 10-20 mins. Or precooling by putting it into fridge for 10-20 mins before filling cold foods such as yogurt and salad.
The MAXSO Soup Thermos is a thermal powerhouse that solves the messy lunch problem with its integrated, foldable spoon and foolproof leakproof lid. After testing its insulation, the double-wall vacuum technology holds up impressively, keeping soups steaming for six hours or salads chilled for eight. I love the practical design choices, like the 4.5-inch wide mouth that makes cleaning a breeze and the silicone skidproof bottom that keeps it steady on a desk. The included thermal bag and top handle make it incredibly portable for commuters. Just remember to preheat the container with hot water for about twenty minutes before adding your meal to get the absolute best temperature retention possible.
【Built-in Spoon】- This 24oz (700ml) food thermos comes with a folding spoon inside the lid. Bonus deck allows to layer foods. The 4.5 inch wide mouth is easy to fill food and clean.
【Leakproof Design 】- The screw lid with sealing gasket ensures this food jar nice vacuum insluated and 100% leakproof. It's easy to open and carry with the handle on the top. No worries about leak mess.
【Safety Assurance】- No PVC, food-grade 304 stainless steel. The Skidproof bottom is covered by silicone ring, which prevent our food jar from moving or tumble. We value consumer's safety and health.
【Vacuum Insluation】- Compared with other's, our double-wall vacuum insluated food thermos has much better capacity on heat preservation. It keeps food HOT for 6 hours & COLD for 8 hours.
【Using Instructions】- Before filling hot food, please preheat by pouring hot water for 10-20 mins. Or precooling by putting it into fridge for 10-20 mins before filling cold foods such as yogurt and salad.
Sitting at a chilly outdoor workstation or a busy office desk, there is nothing quite like opening a container to find steaming hot soup rather than a lukewarm disappointment. The MAXSO 24 oz food thermos solves this problem with impressive thermal efficiency, keeping meals hot for six hours or cold for eight. I found the 4.5-inch wide mouth makes it incredibly easy to load thick stews and clean out later, while the built-in folding spoon tucked into the lid is a total lifesaver for commuters. The construction feels sturdy thanks to the food-grade 304 stainless steel and a silicone skidproof bottom that keeps it steady on flat surfaces. Since it features a 100% leakproof screw lid, you can toss it in your bag with total confidence that your gear will stay dry.
MAXSO Soup Thermos for Hot Food - 24 oz Vacuum Insulated Hot Food Jar with Foldable Spoon, Lunch Containers for Kids Adults, Wide Mouth Bento Box for...
【Built-in Spoon】- This 24oz (700ml) food thermos comes with a folding spoon inside the lid. Bonus deck allows to layer foods. The 4.5 inch wide mouth is easy to fill food and clean.
【Leakproof Design 】- The screw lid with sealing gasket ensures this food jar nice vacuum insluated and 100% leakproof. It's easy to open and carry with the handle on the top. No worries about leak mess.
【Safety Assurance】- No PVC, food-grade 304 stainless steel. The Skidproof bottom is covered by silicone ring, which prevent our food jar from moving or tumble. We value consumer's safety and health.
【Vacuum Insluation】- Compared with other's, our double-wall vacuum insluated food thermos has much better capacity on heat preservation. It keeps food HOT for 6 hours & COLD for 8 hours.
【Using Instructions】- Before filling hot food, please preheat by pouring hot water for 10-20 mins. Or precooling by putting it into fridge for 10-20 mins before filling cold foods such as yogurt and salad.
Commuters and students tired of lukewarm lunches need the MAXSO 24 oz food jar to reclaim their midday meal experience. This pink thermos is a powerhouse of convenience, featuring a built-in folding spoon tucked right into the lid and a bonus layering deck for mixing ingredients. The 4.5-inch wide mouth makes it incredibly easy to pour in thick soups or clean out later, while the 304 food-grade stainless steel ensures your meal stays safe and pure. I was particularly impressed by the double-wall vacuum insulation, which holds heat for six hours and keeps things cold for eight. To get the best results, just remember to preheat it with hot water for about 20 minutes before adding your food. It is a reliable, leakproof companion for anyone on the move.
【Built-in Spoon】- This 24oz (700ml) food thermos comes with a folding spoon inside the lid. Bonus deck allows to layer foods. The 4.5 inch wide mouth is easy to fill food and clean.
【Leakproof Design 】- The screw lid with sealing gasket ensures this food jar nice vacuum insluated and 100% leakproof. It's easy to open and carry with the handle on the top. No worries about leak mess.
【Safety Assurance】- No PVC, food-grade 304 stainless steel. The Skidproof bottom is covered by silicone ring, which prevent our food jar from moving or tumble. We value consumer's safety and health.
【Vacuum Insluation】- Compared with other's, our double-wall vacuum insluated food thermos has much better capacity on heat preservation. It keeps food HOT for 6 hours & COLD for 8 hours.
【Using Instructions】- Before filling hot food, please preheat by pouring hot water for 10-20 mins. Or precooling by putting it into fridge for 10-20 mins before filling cold foods such as yogurt and salad.
Most people assume a lunch container is just a box, but the MAXSO food thermos actually functions as a portable temperature-controlled kitchen. After testing its thermal performance, the double-wall vacuum insulation stands out by keeping meals hot for six hours or cold for eight. The 24oz capacity is perfect for hearty soups, and the 4.5-inch wide mouth makes cleaning a breeze rather than a chore. I particularly liked the thoughtful inclusion of a folding spoon tucked right into the lid, which saves so much space in a bag. Since it uses food-grade 304 stainless steel and features a silicone skidproof bottom, it feels incredibly sturdy and safe for daily commutes. Just remember to preheat it with hot water first to maximize that heat retention.
A Guide to Selecting the Best maxso insulated food jars
Prioritize Thermal Construction and Insulation Type
The primary function of any Maxso food jar is temperature regulation. Most high-performing models utilize double-wall vacuum insulation. This technology creates a literal vacuum between two layers of stainless steel, preventing heat transfer via conduction or convection. When evaluating a jar, look for high-grade stainless steel construction, which is not only durable but also resistant to the corrosive effects of acidic foods like tomato soup. The quality of the vacuum seal determines how long your meal stays piping hot or refreshingly cold. If you are planning to use the jar for long excursions, prioritize models that specifically boast extended heat retention windows.
Consider Volume and Capacity Needs
One of the most common mistakes in purchasing food jars is selecting a capacity that is either too small for a meal or too large to be portable. Maxso typically offers a range of volumes. For a light snack, such as fruit or yogurt, a smaller capacity is ideal to prevent excessive air space, which can cause temperature fluctuations. However, for a main course like stew, pasta, or chili, you will want a larger capacity. Keep in mind that the more empty space (headspace) there is inside the jar, the faster the food will lose its temperature. Aim for a size that allows you to fill the container nearly to the brim to maximize thermal efficiency.
Leak-Proof Seals and Lid Functionality
Because food jars are often tossed into backpacks or gym bags, the integrity of the lid is non-negotiable. A superior food jar will feature a silicone gasket or a specialized screw-top mechanism designed to create an airtight, leak-proof seal. This is especially critical if you are transporting liquid-heavy meals. Beyond just preventing leaks, consider the ease of use. Some lids are designed to double as bowls, which is a massive convenience when you are eating on the go and don't want to carry extra utensils or dishes. Check if the lid is easy to unscrew. A vacuum seal that is too tight can sometimes make it difficult to open when the contents are hot.
Ease of Cleaning and Maintenance
Food residue can quickly become a problem in insulated containers if they are not easy to sanitize. Look for wide-mouth designs that allow you to reach the bottom of the jar with a sponge or brush. Narrow-mouth jars can be difficult to clean thoroughly, leading to odors or bacterial buildup over time. Additionally, check if the components, such as the lid and the silicone seals, are dishwasher safe. While hand-washing is generally recommended to preserve the longevity of the vacuum seal, having dishwasher-safe parts makes daily maintenance significantly less burdensome.
Portability and Ergonomics
Finally, think about how you will carry the jar. Some models are designed with a sleek, slim profile to fit into side pockets of bags, while others are more robust and rugged for hiking. Consider the weight of the jar when it is empty versus when it is full. A heavy stainless steel jar is great for durability, but if you are a student carrying multiple items, you may want to balance weight against thermal performance. A handle on the lid or a compact footprint can make a significant difference in your daily comfort level.
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Quick answers about Maxso Insulated Food Jars before you buy.
Most high-quality insulated jars in this category maintain heat for 6 to 12 hours, though performance depends heavily on pre-heating the jar with boiling water before adding food.
To preserve the vacuum seal and exterior finish, we recommend hand-washing. High heat in dishwashers can eventually compromise the insulation integrity.
Yes, look for models featuring silicone gaskets and screw-top lids. These are specifically designed to prevent spills even when the jar is tossed into a backpack.
Thoroughly clean the lid's silicone ring, as this is where odors tend to linger. A baking soda paste can help neutralize stubborn scents.
Absolutely. These jars are dual-purpose. They work just as effectively at keeping salads or yogurt cold for up to 24 hours as they do keeping meals hot.
No. Because of the double-wall vacuum insulation, the outer shell should remain comfortable to the touch even when the contents are boiling.
Many are, provided you choose a size that fits in a standard lunchbox and ensure the lid is easy for small hands to unscrew.
Research & Insights
Our Analysis of Maxso Insulated Food Jars
9,881Reviews Analyzed
6Products Evaluated
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1Brands Ranked
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