💧 Hydration Redefined: Adventure Awaits! Durable 18/8 pro-grade stainless steel construction for long-lasting adventures. Backed by a lifetime warranty against manufacturer defects for peace of mind. TempShield technology keeps drinks cold for 24 hours or hot for 12. Leakproof design ensures your beverages stay contained, no matter the journey. Ultra-light stainless steel design for effortless hydration on the go. Leakproof Temperature Control Lightweight Design The Hydro Flask 21 Oz Lightweight Standard Flex Cap in Obsidian is a premium stainless steel water bottle designed for outdoor enthusiasts. Weighing only 23.9 g, it features advanced TempShield technology for optimal temperature retention, a durable construction for longevity, and a leakproof design for worry-free hydration. Plus, it comes with a lifetime warranty, ensuring your investment is protected.