Both checked and authorized by building teams, severe athletes, outdoor enthusiasts, military men/women, soccer mommies, and more, The IBEX Tumbler includes 2 layers of additional thick cooking area grade 18/8 Stainless-steel, and vacuum sealed to ensure optimum temperature retention. We understand you” ll love your IBEX Tumbler since 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 need to be hot or cold! This is one of our main reasons for producing the supreme beverage cooler, the IBEX Tumbler. The IBEX V2 Tumbler is crafted with double-wall insulation innovation to keep hot beverages hot and cold drinks cold for approximately 72 hours longer than any leading competitors! 2X