Beautifully designed eco-friendly, stainless steel food jars fits perfectly in Crocodile Creek Lunch boxes! Double-wall insulated to keep school lunches hot (or cold). Extra wide mouth is easy to fill. Cool to the touch with hot foods and sweat-proof with cold foods. Both interior and exterior walls are made from #304 Stainless Steel. Hand washing recommended. Conforms to or exceeds U.S. and European safety standards. Food jars are 11.5 oz. (350 ml.). 5.5?H x 3.5?W.