This is a portable insulated lunch box, the outer layer of PP material, the inner layer of food grade 304 stainless steel, can be heated by microwave. Healthy corrosion resistance, more safe and hygienic. Enhanced PP handle design, easy to move, hidden design does not take up space. Sealed silicone ring, sealed leak proof, double heat insulation design, not afraid of hot. Non-slip bottom. You can pack your food and take it to work, school, or a picnic. 1 location includes the shipping cost to US. Orders of 400 pieces or greater are eligible for sea shipping. 100% guarantee for quality. Rush Service.