20oz Sublimation Tumblers: absolutely straight, same circumference between top and bottom.
Advanced insulation technology: Double-Wall Vacuum insulated thermal design is good for keeping your drinks warm or cold for a longer time, so you can use it in any season.and also our tumbler comes with a push-on Tritan lid keep any dust particles getting in and stop major spills.
Safe and Durable: our sublimation tumbler is made of 304 stainless steel, .more durable than other ordinary plastic; and we add silicone base to keep it from sliding on slippery surfaces and reduce the noise.