Product Description: High quality double layer stainless steel inner liner vacuum design insulation effect: Above 50 ℃ for 6 hours, above 40 ℃ for 12 hours. The inner liner surface adopts electrolytic grinding technology to prevent dirt from forming sealing rings, and the edge is made of food grade PP grade materials. The health and worry free cup cover and stopper have good sealing performance, and the cup body is matte painted with beautiful and long-lasting technology