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Many people find that their water bottles become companions, and you can be sure the Hydro Flask 21oz Standard Mouth Water Bottle will become that and more. This brilliant bottle keeps your beverages cold for 24 hours or hot for 6 hours. Perfect for backpack side pocket or your car's cup holder, the Hydro Flask Standard Mouth Water Bottle will go everywhere with you!
18/8 Pro Grade Stainless Steel – Won't retain or transfer flavor.
BPA-Free and Phthalate-Free
TempShield™ Protected
Durable, Sweat-Free Powder Coat Finish (or Classic Stainless Option)
Compatible with Hydro Flip Lid and Wide Straw Lid
Ideal Size for All-Day Hydration
Fits Most Backcountry Water Filters
Keeps Cold up to 24 Hours
Keeps Hot Up To 12 Hours