[Leak-free] Once it's tightened up, it's tightened up. The structure is so solid and so strong that there are precisely zero chances of the container leaking, so you can put your mind at rest[Healthy Material] This jar is made with best-sourced materials, the bowls are made of 316 stainless steel, rigorous tests have proved them completely safe and harmless, solid and healthy.[8 Hours Heat Retention] This food jar keeps your food warm or cold for up to 8 hours, perfect for keeping lunch warm from 8:00-14:00.[Nice design] Its straight minimalist lines mean that it looks smooth, and the cute blend of its colors means that it's appropriate for kids. There are not many jars like this on the market. You should get one for your kids right now, and start enjoying high-quality food storage.[Worry-Free Guarantee] This lunch jar comes with an 18-month Unconditional Refund & Replacement Warranty, there is absolute ZERO risk and you have nothing to lose, our friendly customer service personal will put a smile on your face every time you get back to us.