Hydro Flask 21 Ounce Standard Mouth

Style: 21OSM

Our Price: $32.95
Hydro Flask 21 Ounce Standard Mouth

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21OSM Hydro Flask 21 Ounce Standard Mouth

This 21 oz is the perfect go-anywhere companion on your busiest days. It stashes easily in a small shoulder bag, your pack’s side pocket or your car cup holder, and holds enough to keep you going for hours without weighing you down.

  • Easy to Transport
  • Versatile, middle-of-the-road size
  • TempShield Protected
  • Keeps cold up to 24 hours
  • Keeps hot up to 6 hours
  • 18/8 Pro Grade Stainless Steel
  • BPA-Free and Phthalate-Free
  • Durable, sweat-free powder coat finish
  • Lifetime Warranty
  • Compatible with Standard Loop Cap and Sport Cap

Product Care

  • Hand wash your flask and cap with hot, soapy water. Rinse the flask as well as the cap, and it's ready for adventure.

You Shouldn't:

  • Put your flask through the dishwasher or soak the exterior in hot water. Doing so can cause discoloration to the exterior.
  • Put the flask on the stove. This could cause damage to the exterior.
  • Soak or put the Flex Cap, Wide Flat Cap, Stainless Steel Flat Cap or Loop Caps through the dishwasher.

You Should:

  • Wash your flask with a bottle brush.
  • Use white distilled vinegar for cleaning. Use a 1/2 cup of vinegar in your flask, gently swirling the vinegar around to wash any affected areas and let sit for 5 minutes. Rinse thoroughly with warm water and repeat if necessary.
  • Use baking soda for cleaning, mix 2-3 tablespoons of backing soda with a small amount of warm water to form a scrubbing paste. Dip the bristles of your bottle brush in the paste and work paste into affected area on the inside of your flask. Repeat as necessary until stain disappears.
  • Wash your Hydro Flip Lid and Wide Straw Lid in the dishwasher. They Hydro Flip Lid and Wide Straw Lid are top-rack dishwasher safe. The cap may lastlonger if it is hand washed, but if it needs to be deep cleaned, the dishwasher is acceptable.
Hydro Flask 21 Ounce Standard Mouth

21OSM Hydro Flask 21 Ounce Standard Mouth

This 21 oz is the perfect go-anywhere companion on your busiest days. It stashes easily in a small shoulder bag, your pack’s side pocket or your car cup holder, and holds enough to keep you going for hours without weighing you down.

  • Easy to Transport
  • Versatile, middle-of-the-road size
  • TempShield Protected
  • Keeps cold up to 24 hours
  • Keeps hot up to 6 hours
  • 18/8 Pro Grade Stainless Steel
  • BPA-Free and Phthalate-Free
  • Durable, sweat-free powder coat finish
  • Lifetime Warranty
  • Compatible with Standard Loop Cap and Sport Cap

Product Care

  • Hand wash your flask and cap with hot, soapy water. Rinse the flask as well as the cap, and it's ready for adventure.

You Shouldn't:

  • Put your flask through the dishwasher or soak the exterior in hot water. Doing so can cause discoloration to the exterior.
  • Put the flask on the stove. This could cause damage to the exterior.
  • Soak or put the Flex Cap, Wide Flat Cap, Stainless Steel Flat Cap or Loop Caps through the dishwasher.

You Should:

  • Wash your flask with a bottle brush.
  • Use white distilled vinegar for cleaning. Use a 1/2 cup of vinegar in your flask, gently swirling the vinegar around to wash any affected areas and let sit for 5 minutes. Rinse thoroughly with warm water and repeat if necessary.
  • Use baking soda for cleaning, mix 2-3 tablespoons of backing soda with a small amount of warm water to form a scrubbing paste. Dip the bristles of your bottle brush in the paste and work paste into affected area on the inside of your flask. Repeat as necessary until stain disappears.
  • Wash your Hydro Flip Lid and Wide Straw Lid in the dishwasher. They Hydro Flip Lid and Wide Straw Lid are top-rack dishwasher safe. The cap may lastlonger if it is hand washed, but if it needs to be deep cleaned, the dishwasher is acceptable.


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