Both checked and approved by building teams, severe professional athletes, outdoor lovers, military men/women, soccer mamas, and more, The IBEX Tumbler features 2 layers of extra thick cooking area grade 18/8 Stainless-steel, and vacuum sealed to guarantee maximum temperature level retention. We know you” ll love your IBEX Tumbler due to the fact that we do too! We take fantastic pride in our item and every purchase comes with a 100% satisfaction assurance. There” s absolutely nothing more frustrating than a luke-warm beverage that should be hot or cold! This is one of our primary factors for creating the ultimate beverage cooler, the IBEX Tumbler. The IBEX V2 Tumbler is engineered with double-wall insulation technology to keep hot beverages hot and cold beverages cold for as much as 72 hours longer than any leading rivals! 2X