The Atlin Tumbler is about 7 inches high and can hold 30oz of liquid, but still manages to fit in *cupholders. According to the product page, it's vacuum-sealed and boasts two layers of insulation to maintain your drink's temperature in even the harshest of climates. The transparent lid even lets you check how much of your drink is left, so you never have to play that annoying guessing game of trying to take a sip and seeing if anything comes out. Read more...