Both checked and authorized by building and construction crews, extreme athletes, outside lovers, military men/women, soccer mamas, 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 know you” ll love your IBEX Tumbler since we do too! We take great pride in our product and every purchase features a 100% satisfaction warranty. There” s nothing more disappointing than a luke-warm drink that should be hot or cold! This is among our primary factors for creating the ultimate beverage cooler, the IBEX Tumbler. The IBEX V2 Tumbler is crafted with double-wall insulation innovation to keep hot drinks hot and cold drinks cold for approximately 72 hours longer than any leading competitors! 2X