Both checked and authorized by construction teams, extreme professional athletes, outside lovers, military men/women, soccer mommies, and more, The IBEX Tumbler features 2 layers of additional thick kitchen grade 18/8 Stainless-steel, and vacuum sealed to guarantee maximum temperature retention. We understand you” ll love your IBEX Tumbler since we do too! We take fantastic 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 reasons for creating the supreme drink cooler, the IBEX Tumbler. The IBEX V2 Tumbler is crafted with double-wall insulation technology to keep hot drinks hot and cold drinks cold for as much as 72 hours longer than any leading rivals! 2X