The heating of silica gel lunch boxes is not toxic, because all silica gel manufacturers must comply with relevant national standards. Therefore, the silicone lunch box is nontoxic.

Unless the compound used by the manufacturer does not meet the requirements in the production process, the product will have safety problems. Therefore, if you want to buy a silicone lunch box, you must go through regular channels and find a regular merchant to buy it.

The silica gel lunch box is made of silica gel, and the heat resistance of silica gel is very good. It will not deform and deteriorate at the high temperature of 240 degrees Celsius.

At the same time, it won't harden at -40 degrees Celsius, so it can be used for steaming, boiling, baking and other heating. It's nontoxic.

Silica gel is an amorphous material with high activity, which contains polysiloxane, silicone oil, white carbon black (silica), coupling agent and filler, etc. The main component is silica, and its chemical molecular formula is mSiO2·nH2O. Insoluble in water and any solvent, non-toxic, odorless, chemically stable, and does not react with any substance except strong alkali and hydrofluoric acid. Different types of silica gel have different microporous structures due to their different manufacturing methods. The chemical composition and physical structure of silica gel determine that it has many characteristics that other similar materials can't replace: high adsorption performance, good thermal stability, stable chemical properties, high mechanical strength, etc.