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 performance without dripping. The fine mesh tea grid design is easy to use and clean. Double cup combinations with different capacities are suitable for different occasions