All Tupperware products are made from safe, non-toxic, non-carcinogenic materials; thus they do not release harmful chemicals to food or liquid contents. Materials & Additives used exceed US Food & Drug Administration (FDA) & Japan Polyolefin Hygienic Association standards. What it means is that you can use with peace of mind every time! Fridge Smart range has a unique venting system to regulate the amount of air flowing through the container. This ensures that fruits and vegetable have the perfect environment to stay fresh.