Both evaluated and approved by construction crews, extreme professional athletes, outdoor lovers, military men/women, soccer moms, and more, The IBEX Tumbler includes 2 layers of additional 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 terrific pride in our item and every purchase includes a 100% complete satisfaction guarantee. There” s nothing more disappointing than a luke-warm beverage that should be hot or cold! This is among our primary factors for producing the ultimate beverage cooler, the IBEX Tumbler. The IBEX V2 Tumbler is engineered with double-wall insulation technology to keep hot beverages cold and hot drinks cold for approximately 72 hours longer than any leading competitors! 2X