Both evaluated and approved by construction crews, extreme professional athletes, outdoor lovers, military men/women, soccer moms, and more, The IBEX Tumbler includes 2 layers of extra thick kitchen area grade 18/8 Stainless-steel, and vacuum sealed to ensure optimum temperature level retention. We know you” ll love your IBEX Tumbler because we do too! We take excellent pride in our item and every purchase features a 100% satisfaction guarantee. There” s nothing more frustrating than a luke-warm beverage that ought to be hot or cold! This is among our main factors for producing the ultimate beverage cooler, the IBEX Tumbler. The IBEX V2 Tumbler is crafted with double-wall insulation innovation to keep hot beverages hot and cold beverages cold for up to 72 hours longer than any leading competitors! 2X