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