This tea pot and a cup set are designed to allow you to enjoy tea time anywhere. The outer silicone case covers both the tea can & the cup and makes them a portable whole. It also protects the fragile glass, so additional protective bag is needed. This silicone case doubles as a heat-resistant cover. There are whorls inside the silicone case to help reduce friction as well as a steam vent, both are designed to makes the product easy to assemble & disassemble.