Both tested and authorized by building and construction crews, severe athletes, outdoor 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 ensure optimum temperature level retention. We understand you” ll love your IBEX Tumbler due to the fact that we do too! We take excellent pride in our product and every purchase comes with a 100% satisfaction guarantee. There” s absolutely nothing more disappointing than a luke-warm drink that ought to be hot or cold! This is among our main factors for creating the ultimate beverage cooler, the IBEX Tumbler. The IBEX V2 Tumbler is engineered with double-wall insulation technology to keep hot drinks cold and hot beverages cold for approximately 72 hours longer than any leading rivals! 2X