Both tested and approved by building teams, extreme athletes, outside 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 make sure maximum temperature level retention. We know you” ll love your IBEX Tumbler due to the fact that we do too! We take terrific pride in our product and every purchase includes a 100% complete satisfaction guarantee. There” s absolutely nothing more disappointing than a luke-warm beverage that should be hot or cold! This is among our primary reasons for developing the ultimate drink cooler, the IBEX Tumbler. The IBEX V2 Tumbler is crafted with double-wall insulation technology to keep hot beverages cold and hot beverages cold for as much as 72 hours longer than any leading competitors! 2X