Both checked and approved by building and construction crews, severe professional athletes, outside lovers, military men/women, soccer mamas, and more, The IBEX Tumbler includes 2 layers of extra thick cooking area grade 18/8 Stainless Steel, and vacuum sealed to ensure maximum temperature retention. We know you” ll love your IBEX Tumbler due to the fact that we do too! We take fantastic pride in our product and every purchase features a 100% satisfaction assurance. There” s nothing more disappointing than a luke-warm drink that need to be hot or cold! This is one of our main factors for producing the supreme drink cooler, the IBEX Tumbler. The IBEX V2 Tumbler is crafted with double-wall insulation innovation to keep hot beverages cold and hot beverages cold for as much as 72 hours longer than any leading rivals! 2X