KEY FEATURES Double-layer vacuum high-quality stainless steel, the bottom of the cup is covered with a layer of plastic, which is firm and anti-scratch.- Food grade PP, safe and reliable; outer thickening paint surface, not easy to fall paint. Portable hand strap for easy carrying.- Thermos cup buckle, one button open, one-handed operation. Keep warm for 12 hours for temperature more than 52 Deg.C, keep cold for 12 hours for temperature less than 10 Deg.C.