The whole tumbler is designed very well, has good build-up, upscale materials, and has good looking as well. The biggest issue of the tumbler is the flip lid, that is the only reason I didn't give a full rating. When the flip cover opens fully, the rubber still touch the nose when I sip the beverage inside. After the hot coffee is filled in the tumbler, the lid is hard to close firmly unless you open up the flip cover first.
The rubber at the bottom of the tumbler is not easy to attach properl...