... 3,Keep Warm&Cold for 4~6 hours SS Lunchbox Set,Hot Food Container Product InformationModel number:3831BPacking:24 PCSCapacity :1000 ... CMMaterial:Food Grade PP, Stainless Steel, Stainless IronMaterial free:Phthalate, melamine, BPA, flame retardants, Nitrosamine, Latex, PVC,SGS:Cadmium, Lead safetyCare ... plastic. The SS Bento Jar is BPA free. SS Lunchbox Set