The slender and ergonomic design ensures comfort for hands of all sizes. Crafted from professional food-grade 18/8 304 stainless steel, it effectively prevents the retention or transfer of flavors. With its double-wall insulation and vacuum sealing, it maximizes temperature retention. The BPA-free Push On Lid securely attaches to the tumbler via a push-seal mechanism, and its crystal clear design forms a tight seal with a silicone gasket, effectively preventing any spills. • Double Wall Vacuum Insulation can keep your drinks hot or cold for hours • Built to Last made of 304 18/8 high-quality and food-grade stainless steel • Cup Holders designed to fit standard size cup holders