Best Thermal Lunch Boxes of 2025

"I bought these based on the reviews, but I'm really disappointed. My kids love bringing homemade soups or leftovers, but these containers don't keep the food cold or warm at all. Total waste of money; I wouldn't recommend them."

"My son uses it for lunch and loves how easy it is to open. However, he keeps telling me his food is cold by the time he eats at noon after I packed it hot at 8:30 AM. It’s frustrating!"

"I liked the concept, but when it arrived, I found it to be smaller than I anticipated. Still, it does keep food warm for a decent time. Not perfect, but it gets the job done."

"I needed a heat-saving container for my lunchbox. It’s the perfect size and it keeps my food warm. Great closure and it arrived quickly!"

"I didn’t expect much from these containers due to mixed reviews, but they were affordable so I gave them a try. Both my kids said these keep their food warmer than funtainers. I preheat them with boiling water before packing, and they retain some warmth after 5 hours. Not bad!"

"I searched for an insulated lunch box that would keep meals warm instead of cold sandwiches. This one exceeded my expectations! I boil water, pour it in the container, and then add the hot food. It’s still warm by lunchtime, making it worth the price."

"I really appreciate how practical it is to use."

"However, I'm not pleased that it doesn't keep things hot."

"After trying various thermal containers, I’m excited about this one! We conducted a test, and it performed well, so I’m optimistic it will keep my son's meals hot for school."

"I bought this for my daughter’s hot lunch. It’s adorable, but unfortunately, her lunch ends up cold by lunchtime."

"I love the design and size, but it doesn’t maintain heat well. My grilled food was lukewarm after an hour and a half."

"I bought this set to transport homemade meals to my mom in the hospital. It's a cute set with a well-insulated carry case, perfect for keeping soup hot and salads cold."

"While I think the design is lovely, I've noticed the insulation is ripping after just four months. Despite the style, it doesn't heat food well, which is disappointing."

"I was really excited about these containers, but unfortunately, there's a lot of food stuck under the rim even after handwashing. I wish I had caught it before the return window closed."

"I really wanted this to work for us. It looks nice and the portion sizes are great. Unfortunately, the containers don't keep the food hot. My husband’s meal was no longer hot after 2 hours. We'll use them for sliced fruit or salad instead."

"I love the two different sizes and the included bag and utensils. My only concern is that the thermos doesn't keep food warm for long. My kids have used other products that keep food warm until late afternoon, but with this one, it's often cold by noon."

"I knew these were not vacuum insulated, but I expected them to perform better. They cooled to 90 degrees Fahrenheit in less than 2 hours, which is only slightly better than a glass dish. Nice and inexpensive, but I’m disappointed with the spill-proof lids."

"I buy these for my kids to take lunches to school. They work great and are very durable. Although it says not dishwasher safe, I've always put mine in the top rack and never had any problems."

"My daughter brought this to school two days in a row. It did not keep her food warm at all and it leaked the second day. The rubber seal wouldn't stay on, even though we preheated it with hot water. We returned it for a metal round top thermos."

"Not recommended for young kids. The idea of the top is good, but it's not user-friendly for kindergarteners. My child gets frustrated trying to open it, and the food doesn't stay at a good temperature. It’s now just sitting in my drawer."

"I really love the cute packaging and find it suitable for my daughter’s lunch. However, I noticed that her food was cold after just three hours. It's adorable, but don't expect it to maintain temperatures like a Thermos."

"I hardly ever write reviews, but this product deserves it! I bought it for my kids since their school food isn't great, and I wanted them to have acceptable temperature food. The beige material is easy to clean, and it comes with four containers and a folding spoon. They look good quality, and I hope they prove useful!"

"With the right prep—letting boiling water sit in the thermos for 5-10 minutes—I find that hot food stays warm until lunchtime, which is about four hours for me. The containers are not only super cute, but they also stack nicely and have vent holes for microwaving. However, it would be great if it included a fork since I usually need to bring my own."

“This little soup thermo worked like a charm! I took soup for a picnic lunch in the mountains and the food stayed hot for hours until we stopped for lunch. The foldable spoon in the cap was great too. The mouth of the cannister was wide enough to eat straight from and was easy to fill with the soup at home. Loved this little thermo. I will be using it often for outdoor activities when hot soup will taste good on a cold day.”

“I LOVE soups and greasy pastas and yogurt and all those other little gooey things. I work in a fast-paced environment where I don't want to bring anything in glass, and I may not have access to a fridge or microwave all the time. After testing it, I couldn't believe it—my soup was still hot after eight hours! I've tried it with other dishes, and they all kept almost perfect temperature. This is great if you're trying to eat healthy portions. 10/10 stars, I bought another one for my partner.”

“Absolutely brilliant. I use this for work every day. I put the hot contents in at around 6:30 AM and when I have lunch at 1:30 PM, it is still hot. This saves me queuing at lunch to use the microwave. I definitely recommend this product.”

"I packed SpaghettiOs for my son, but when he opened his lunch, it had leaked everywhere in his bag."

"This product leaks like crazy—definitely not worth the trouble of returning it."

"Primera vez que no me gusta el artículo que compré."