Hydro Flask

21oz Standard Mouth With Flex Straw Cap Drinks Bottle

Flip it, sip it, and stay hydrated on the go with the Hydro Flask 21 oz Standard Mouth Bottle with Flex Straw Cap. The flexible, comfortable handle and closeable, leakproof straw make it easy to drink with one hand, giving you on-demand refreshment wherever life takes you.

Thanks to Hydro Flask’s innovative TempShield double-wall vacuum insulation, your drinks stay exactly how you want them. The double-walled stainless steel creates a vacuum that prevents heat transfer, while the insulated Flex Cap and reflective interior help maintain the perfect temperature. Your drink can stay refreshingly cold for up to 24 hours or piping hot for up to 12 hours, making this bottle a true temperature guardian.

The 21 oz Standard Mouth design is slim enough to fit most cup holders, easy to carry thanks to the practical loop on the Flex Cap, and wide enough for ice cubes to keep your beverages extra chilled. Made from BPA-free, 18/8 Pro-Grade stainless steel, it’s safe, durable, and ready for every adventure, whether you’re commuting, hiking, or powering through a busy day. With the Hydro Flask 21 oz, staying hydrated has never been this simple, stylish, or reliable.