Signature Tumblers use double-walled technology to greatly reduce the amount of condensation. No need for a coaster! Our double-walled technology allows your beverage to maintain itÆs temperature longer, helping hot drinks stay hot and cold drinks stay cold! Signature Tumblers are virtually indestructible and guaranteed for life. They wonÆt crack or shatter! Our tumblers are safe anywhere in the kitchen. Conveniently clean them using the dishwasher, or quickly reheat in the microwave. Two-position closure lid with spot for straw included with this tumbler mug.