HRERS insulated lunch box food jar thermo hot cold food lunch bag container bowlg,20-ounce Silver (16.510.5cm) Double wall vacuum ineulated .Leak proof and 100% BPA free . Unbreakable 18/8 stainless steel interior and exterior .Easy-to-fill wide mouth keep foods hot or colb 6-12 hours . pre-chill or pre-heat the food jar priot to use wide mouth of the jar food-grade 304 stainless steel easy to and clean vacuum layer double wall vacuum insulated insulated lid doubles as serving bowl leak-proof lib food grade pp material BPA-free 304 stainless steel inner the inner surface is treated with sandblasting or electro-lytic charge .No BPA liners used . piease rest assured that it is safe for drinking.