Both tested and approved by construction crews, extreme professional athletes, outside enthusiasts, military men/women, soccer moms, and more, The IBEX Tumbler includes 2 layers of extra thick cooking area grade 18/8 Stainless Steel, and vacuum sealed to make sure maximum temperature retention. We understand you” ll love your IBEX Tumbler due to the fact that we do too! We take excellent pride in our product and every purchase features a 100% complete satisfaction warranty. There” s nothing more frustrating than a luke-warm drink that ought to be hot or cold! This is one of our primary factors for producing the ultimate beverage cooler, the IBEX Tumbler. The IBEX V2 Tumbler is crafted with double-wall insulation technology to keep hot drinks hot and cold beverages cold for as much as 72 hours longer than any leading competitors! 2X