Both tested and authorized by building teams, severe athletes, outdoor lovers, military men/women, soccer mothers, and more, The IBEX Tumbler includes 2 layers of additional thick cooking area grade 18/8 Stainless Steel, and vacuum sealed to guarantee maximum temperature retention. We know you” ll love your IBEX Tumbler due to the fact that we do too! We take excellent pride in our item and every purchase includes a 100% fulfillment warranty. There” s absolutely nothing more disappointing than a luke-warm beverage that should be hot or cold! This is among our primary factors for developing the ultimate drink 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 as much as 72 hours longer than any leading competitors! 2X