Product Description: High quality double layer stainless steel inner liner with vacuum design and 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 food grade PP grade materials are used along the mouth. The healthy and worry free cup cover and stopper have good sealing without dripping. Different shapes and capacities of cups and kettles are suitable for different needs, and one pot with multiple cups is more practical