Stainless steel water cup

描述

High insulation and cold retention (hot water at 95℃ is above 73℃ after 6 hours, cold water at 4℃ is below 8℃ after 6 hours)
2 times the medial fluorine layer, sports drink can also drink!
On the one hand, it can maintain the heat preservation and cooling power. On the other hand, the vacuum layer can be thin to 1mm, realizing lightweight.