Both tested and approved by construction crews, extreme professional athletes, outdoor lovers, military men/women, soccer moms, and more, The IBEX Tumbler features 2 layers of additional thick kitchen grade 18/8 Stainless Steel, and vacuum sealed to ensure maximum temperature level retention. We understand you” ll love your IBEX Tumbler since we do too! We take excellent pride in our item and every purchase includes a 100% fulfillment assurance. There” s nothing more frustrating than a luke-warm drink that need to be hot or cold! This is one of our main factors for producing the ultimate drink 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 up to 72 hours longer than any leading rivals! 2X