On the go Jeepin' It! The 20 oz 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. Our tumblers are 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.
