This tumbler is your do anything go anywhere cup. Whether it is your coffee cup or smoothie mug in the morning, keeping your water cold throughout the day, or a way to keep your beer cold after a long day of hiking. This guy can do it all. The included insulated lid makes sure the tumbler retains heat or cold for hours. Testers appreciate how solid this mug feels in hand as well as how easy to clean the tumbler is. The slim build will fit into most cup holders. The optional straw lid transforms your tumbler into the perfect office companion.