INSULATION: Incredibly lightweight, vacuum-insulated bottle provides 10 hrs. heat and 20 hrs. cold retention while being 1/3rd lighter than traditional designs. DURABLE: Glacier Stainless Steel boasts unrivaled purity and durability. Made of high-grade 18/8 stainless steel and built to last for years to come. Leash provides convenient attachment point. SECURE, EASY OPENING: Secure, screw top cap includes leverage enhancing lobe which makes opening frozen bottles easy, even with mittens or gloves on. COMPACT DESIGN: Impossibly thin, 2 mm walls are actually thinner than most single wall plastic bottles for an amazingly compact footprint that fits anywhere. GSI OUTDOORS – INNOVATION FOR EVERY ADVENTURE: Since 1985, GSI Outdoors has been designing rugged, reliable gear that elevates outdoor cooking and dining for campers and hikers, inspiring explorers to enjoy great food and memorable moments in nature. GSI Outdoors products are covered by a Lifetime Warranty against material and workmanship defects. Streamlined, tough, lightweight - the Microlite 720 Twist holds the cold for 24 hours, and keeps the heat for 12. And its advanced engineering goes beyond insulation. The walls are impossibly thin – just 2mm – so we’ve shed a bunch of weight and streamlined the profile without sacrificing durable performance. The 18/8 stainless steel is tough and pure, and the secure twist-top is engineered for easy opening – even with gloves on.