If the 21 oz bottle you have has a standard opening, not a wide opening, it should fit.

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Hydro Flask Standard Mouth Stainless Steel Cap

Q: Why so expensive? i can get it cheaper from hydro flask, rei, dick sporting goods, etc.

Sure you can , If dick sporting goods has the same brand and style

Q: Is this product authentic? Made by Hydroflask?

Hello Robert - Wendy from Tall Ridge here - This Hydro Flask Standard Mouth Insulated Sport Cap purchased from us is authentic. We are an authorized Hydro Flask dealer. Please feel free to check us out. We want you to feel comfortable with your purchase. All Hydro Flask products purchased from us are authentic Hydro Flask products.

Q: Does this work for the 64 oz growler?

Hello James - Wendy from Tall Ridge here - The Hydro Flask 64 ounce Growler is a Wide Mouth. The Hydro Flask Insulated Sport Cap is for the Standard Mouth bottles only.

4.5/5

Product ID: 406840947

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Details

Material
Stainless
Color
Stainless
Brand
Hydro Flask
Style
Flex Cap
Product Dimensions
1.89"L x

Description

Hydro Flask Standard Mouth Stainless Steel Cap

Specifications

Is the item dishwasher safe?	Yes
Is the item microwaveable?	Yes
Material Type	Stainless Steel
Item Weight	3.95 g
Item Dimensions L x W	1.89"L x 1.89"W
Closure Type	Snap
Style	Flex Cap
Item Shape	Round
Color	Stainless Steel

Have a Question? See What Others Asked

Why so expensive? i can get it cheaper from hydro flask, rei, dick sporting goods, etc.

Is this product authentic? Made by Hydroflask?

Does this work for the 64 oz growler?

Does it fit a 21 oz?

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