Both evaluated and approved by construction crews, extreme professional athletes, outdoor lovers, military men/women, soccer mothers, and more, The IBEX Tumbler features 2 layers of extra thick kitchen area grade 18/8 Stainless Steel, and vacuum sealed to ensure optimum 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% fulfillment guarantee. There” s nothing more disappointing than a luke-warm drink that ought to be hot or cold! This is among our main reasons for producing the supreme drink cooler, the IBEX Tumbler. The IBEX V2 Tumbler is crafted with double-wall insulation technology to keep hot beverages cold and hot drinks cold for as much as 72 hours longer than any leading competitors! 2X