... for 4~6 hours Bento Lunch Box,Thermal Container Material:Food Grade PP, Stainless Steel, Stainless IronMaterial free:Phthalate, melamine, BPA, flame ... tank and Glass tankYes for PP inner tank.insulated lunch container, About package,we can produce as customers' request..We ... healthy and fresh as possible.Hot or cold Unbreakable stainless steel interior and Food-Grade PP exterior, Extra wide mouth is ...