KEEP YOUR DRINK ICE COLD 24H EASILY TRIPLE INSULATION TECHNOLOGY Each 64Hydro tumbler has double-walled, vacuum-sealed and copper-coated insulation, which helps keep drinks cold for up to 24 hours & hot for up to 12 hours. CONSTRUCTED OF 18/8 STAINLESS STEEL Known for its strength and purity, our 18/8 food-grade tumbler won’t break, rust, retain or transfer flavors. Our tumblers provide a clean, non-metallic taste. KEEP YOUR DRINK HOT AND COLD IN STYLE Our insulated stainless steel tumblers are the perfect accessories for your daily life. With a huge variety of colors and designs, we know you will fall in love with one of our insanely well insulated tumblers. 64HYDRO 20oz Stainless Steel Tumbler Triple Insulation Technology Constructed of 18/8 Stainless Steel Keep Your Drink Hot and Cold in Style! TAKE THE TUMBLER EVERYWHERE WITHOUT ANY WORRIES ANTI-LEAK, BPA-FREE FLIP LID Each tumbler comes with an Anti-Leak, BPA-Free flip lid. The lid will prevent any accidental spills. Anti-glug hole ensures the smooth flow of water and a comfortable drinking experience. NO SWEAT, NO PROBLEMS Our copper wall layer creates a condensation-free exterior that won't sweat on your hands or in your bag