An ideal choice for people on the go, the Stainless King Vacuum Insulated 20 Ounce Tumbler is built to last and loaded with features to make for a more enjoyable drinking experience. Thermos vacuum insulation technology virtually eliminates temperature change within the beverage container by creating an airless space between two stainless steel walls. The result is an insulation layer that performs better than any other. A superior insulated container you can depend on to keep your beverages hotter, colder, fresher, longer. This 20 Ounce tumbler keeps beverages cold up to 20 hours making it a great choice for long days out and about, in the office or relaxing at home. Constructed with double wall stainless steel, this 20 ounce tumbler is durable, yet its sleek design is both eye-catching and functional. The contoured body shape is easy to grip and fits most automobile cup holders. The Stainless King 20 Ounce Tumbler comes equipped with a 360 Degree drink lid with a press fit which securely stays in place and allows you to drink from anywhere on the lid. And because of the double wall insulation, the stainless steel body stays condensation-free with cold beverages. In order to maximize the incredible insulation technology, it is recommended to pre-chill the tumbler just prior to use. This can be accomplished by filling the tumbler with cold water, attaching the lid and letting it rest for a few minutes. Before you are ready to use, simply empty the water and fill with your favorite beverage.