Reusable FDA approved silicone food storage bag - airtight zip seal bags keep your food fresh. Bag for cooking, sous vide, lunch, snack, sandwich, freezer. No Color dyes: unlike others, only Clear silicone with no dyes. Sous vide bags are made of safe FDA certified food grade silicone which contains no BPA, no BPS, no bpf, no PVC, no phthalates, no petroleum, is plastic free & latex free. Hermetic seal: pack your food into airtight silicone food storage bags refrigerate or freeze, marinade before cooking, microwave or boil, reheat, even eat out of & finally save your leftovers for lunch at work. Hermetically sealed closure is leak-proof Vacuum and zip-locked to preserve & extend the freshness of your food for healthy nutrition, money saving & less food waste.