Both checked and approved by building crews, severe athletes, outdoor enthusiasts, military men/women, soccer mommies, and more, The IBEX Tumbler features 2 layers of extra thick kitchen grade 18/8 Stainless-steel, and vacuum sealed to make sure optimum temperature level retention. We understand you” ll love your IBEX Tumbler because we do too! We take excellent pride in our product and every purchase features a 100% fulfillment warranty. There” s absolutely nothing more disappointing than a luke-warm drink that ought to be hot or cold! This is one of our primary reasons for producing the ultimate drink cooler, the IBEX Tumbler. The IBEX V2 Tumbler is crafted with double-wall insulation technology to keep hot drinks hot and cold beverages cold for up to 72 hours longer than any leading competitors! 2X