In principle, sealable food trays should not contain BPA. They are made from PS (polystyrene), PVC (polyvinyl chloride), PET (polyethylene terephthalate) or PP (polypropylene). The films are often made from LDPE (low-density polyethylene) or PVC. However, BPA may sometimes be used in PVC as a stabiliser. As a rule, we would advise you to contact your supplier to check.