Hydro Flask 21oz / 621ml Standard Mouth + Flex Straw Cap Water bottle

SLIM DESIGN FOR EASY FIT: Standard Mouth bottle fits most cupholders and backpack pockets; ideal for commuting, travel, and everyday hydration. DOUBLE-WALL VACUUM INSULATION: TempShield technology keeps drinks cold for up to 24 hours and hot for up to 12 hours; prevents condensation on the outside. LEAKPROOF WHEN CLOSED: Flex Straw Cap offers a secure seal to prevent spills; closeable straw makes sipping convenient and mess-free. DURABLE STAINLESS STEEL: Built from high-quality stainless steel for long-lasting performance; dishwasher safe for easy cleaning. COMFORTABLE FLEX STRAP: Flexible handle for easy carrying; designed for one-handed opening and closing for on-demand hydration.

The Hydro Flask 21oz Standard Mouth with Flex Straw Cap is the perfect water bottle for everyday use, commuting, workouts, and outdoor adventures. Featuring double-wall TempShield® vacuum insulation, it keeps cold drinks refreshingly chilled for up to 24 hours. The redesigned Flex Straw Cap allows for easy one-handed sipping and is leakproof when closed, making hydration effortless on the go. Its slim Standard Mouth design fits comfortably in your hand and slides easily into backpack pockets and cupholders. Made from durable 18/8 stainless steel, BPA-free, and flavor-resistant, this bottle is built to keep you hydrated wherever life takes you.