The TREK 30 oz Tumbler is a durable, Double Wall Vacuum Insulated, Stainless Steel Tumbler that will keep ice cold for up to 24 hours and hot drinks warm for up to 6 hours. We want to make sure your Tumbler lasts, so each TREK 30 oz Tumbler is powder coated with a Gloss Coat to keep the Tumbler from chipping or scratching unless it is put in the Dishwasher. The TREK 30 oz Tumbler's sleeker base allows it to fit into any cup holder making this a great gift for anyone always moving. The Crystal Clear Airtight sealing lid also keeps your drink in the Tumbler and not on your clothes, the see-through ability lets you know when its time for a refill with ease.