Both tested and approved by building and construction crews, extreme athletes, outdoor lovers, military men/women, soccer mamas, and more, The IBEX Tumbler features 2 layers of additional thick kitchen area grade 18/8 Stainless-steel, and vacuum sealed to guarantee maximum temperature retention. We know you” ll love your IBEX Tumbler since we do too! We take excellent pride in our item and every purchase comes with a 100% satisfaction warranty. There” s absolutely nothing more disappointing than a luke-warm beverage that ought to be hot or cold! This is one of our main reasons for producing the supreme beverage cooler, the IBEX Tumbler. The IBEX V2 Tumbler is engineered with double-wall insulation technology to keep hot drinks cold and hot drinks cold for up to 72 hours longer than any leading competitors! 2X