Both checked and authorized by building crews, extreme athletes, outdoor enthusiasts, military men/women, soccer mommies, and more, The IBEX Tumbler features 2 layers of additional thick kitchen grade 18/8 Stainless-steel, and vacuum sealed to make sure maximum temperature retention. We understand you” ll love your IBEX Tumbler since we do too! We take great pride in our product and every purchase comes with a 100% fulfillment warranty. There” s nothing more frustrating than a luke-warm beverage that ought to be hot or cold! This is among our primary factors for producing the ultimate beverage cooler, the IBEX Tumbler. The IBEX V2 Tumbler is engineered with double-wall insulation innovation to keep hot drinks cold and hot beverages cold for up to 72 hours longer than any leading competitors! 2X