We believe that real warmth does not need fancy decorations. From the 316L medical stainless steel liner to the food-grade silicone seal, each part has been subjected to 72 hours of extreme testing. There is no Internet celebrity design, only solid temperature-locking technology; we don’t say “permanent heat preservation”, but we hope that the hot tea in the morning is still delicious in the evening. Those marks of repeated rubbing and the traces of years of use by the owner are the product medals we cherish most.