FDA approved premium food-grade silicone material. No more worries about unsafe toxicity from heating with plastic bowl in the microwave.
Easy to use: easy stacking and storage which means no more lids lost, ensure lids stay where you can find them.
Collapsible lunch container with lids,can be storge with its 1/3 size to save space when not in use.
You can even put it in your computer bag! Easy to carry!