Both checked and authorized by building and construction crews, extreme athletes, outdoor lovers, military men/women, soccer mothers, and more, The IBEX Tumbler includes 2 layers of extra thick kitchen grade 18/8 Stainless-steel, and vacuum sealed to ensure maximum temperature retention. We understand you” ll love your IBEX Tumbler since we do too! We take great pride in our item and every purchase comes with a 100% satisfaction guarantee. There” s absolutely nothing more disappointing than a luke-warm drink that must be hot or cold! This is among our main reasons for producing the supreme beverage cooler, the IBEX Tumbler. The IBEX V2 Tumbler is crafted with double-wall insulation technology to keep hot drinks cold and hot beverages cold for as much as 72 hours longer than any leading competitors! 2X