We'd like to assure you that we take the safety of our food and packaging very seriously. The trays we use are made of CPET (Crystalline Polyethylene Terephthalate) plastic only and don't contain BPAs that have in some studies been associated with risks to human health.
We're confident that our COOK trays are safe to heat up and wouldn't provide our COOK meals in containers that we weren't 100% happy with.