20 oz Tumbler - Skinny Tumblers. A tumbler that's as unique as you are. Our skinny tumblers are slim and straight, and come with a lid and straw. It's easy to see why these have become the favorite of coffee lovers everywhere. They fit any cup holder or hand comfortably and are double-walled so it's hot in the winter and cold in the summer. Having excellent double-wall vacuum insulation that helps keep cold drinks frosty cool or hot drinks toasty warm from the first sip to the very last drop. Featuring a slim body and straight wall, it fits comfortably into hands of all shapes and sizes and perfectly fits virtually any cup holder.