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Product Highlights:

  • Has a double wall vacuum Insulation
  • Keeps hot for up to 12 Hrs.
  • Keeps cold for up to 24 Hrs.
  • BPA-Free
  • 18/8 Stainless Steel, Signature matte finish 

About Hydro Flask Standard Mouth 21 oz. Bottle

Hydro Flask Standard Mouth 21 oz. Bottle
The Hydro Flask Standard Mouth 21 oz. Bottle is exceptional. There are going to be times when you are going to want to take your favorite hot drink or cold drink, along with you. With this Flask, you can hydrate yourself in the summer with a cool drink, and in the winter you can drink a hot chocolate to keep you toasty. This flask has double wall vacuum insulation allowing drinks to remain hot for up to 12 hours, and cold ones, for up to 24 hours. It also features 18/8 stainless steel to keep bacteria away, ensuring freshness, without any unpleasant odor or strange aftertaste. The Hydro Flask Standard Mouth 21 oz. Bottle is absolutely perfect for those who like to take along their favorite drink along, whether hot or cold.

Hydro Flask Standard Mouth 21 oz. Bottle Features

  • Patented Standard Mouth Size
  • Double Wall Vacuum Insulated
  • Keeps Hot 12 Hours
  • Keeps Cold 24 Hours
  • BPA-Free
  • 18/8 Stainless Steel
  • Signature Matte Finish
  • Lifetime Warranty

Hydro Flask Standard Mouth 21 oz. Bottle Specifications

Model Capacity
12 oz
Mouth Width
Bottle Weight
10.4 oz
Bottle Height
Bottle Height with Cap
Bottle Circumference
Bottle Diameter
Mouth Size
Patented Standard
Double Wall Vacuum
Keeps Hot Duration
12 Hours
Keeps Cold Duration
24 Hours
Bottle Material
Steel Stainless
Steel Size
Signature Matte Finish
Available in the Following Colors:
Black Butte, Classic Stainless, Everest Blue, Lychee Red
Weight [with packaging]
0.65 lb
Mfr #

Standard Mouth 21 oz. Bottle Customer Reviews

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(based on 1 review)

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Reviewed by 1 customer

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Great for all purposes

By Sha

from Boston

Verified Buyer



      Best Uses

        Bought for a friend .. He love it .. I love mine .. Works great !

        • Was this a gift?:
        • Yes

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        Questions & Answers Powered by TurnTo®

        Questions about this item:

        Brianne L  Does any part of the cap have plastic in it that touches the liquid in the bottle?
        PATRICIA D  No I live in Florida and have taken this to beach several times and had ice cold water purchased it for my daughter and son in law we all love it
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