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

Hydro Flask Standard Mouth Flex Straw Cap Black, 1 Pack (1 Pack)

Hydro Flask Standard Mouth Flex Straw Cap Black, 1 Pack (1 Pack)

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.

Product ID: 744523737

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Details

Brand
Hydro Flask
Capacity
510 g
Color
Black
Recommended Uses For Product
Water
Special Feature
TempShield

🥤Fits all Standard Mouth Hydro Flask bottles

✂️Customizable straw length

🛡️Leak-proof & insulated cap

Frequently Bought Together

Hydro Flask Standard Mouth Lids- Accessory for Standard Mouth Water Bottle

Hydro Flask Replacement Straws 3 Count (Pack of 1)

Hydro Flask Wide Mouth Lids- Accessory for Wide Mouth Water Bottle

Description

🥤 Sip smart, stay cool, and never miss a beat with Hydro Flask Flex Straw Cap!

CUSTOM FIT STRAW - Easily trim the flexible straw to your perfect length—hydration tailored to you.
TEMPERATURE LOCK - Honeycomb insulated cap maximizes cold retention, keeping your drink refreshingly chilled.
HYGIENIC EASY CLEAN - Removable parts and dishwasher safe design make maintenance a breeze.
LEAK PROOF CONFIDENCE - Carry your drink worry-free with a cap that locks in every drop.
UNIVERSAL COMPATIBILITY - Seamlessly fits all Hydro Flask standard mouth bottles for effortless hydration.

The Hydro Flask Standard Mouth Flex Straw Cap in sleek black upgrades your hydration game with a leak-proof, honeycomb insulated design that fits all standard mouth Hydro Flask bottles. Featuring a customizable straw, BPA-free materials, and dishwasher-safe parts, it ensures cold drinks stay refreshingly chilled and easy to enjoy on the move.

Specifications

Manufacturer	Hydro Flask
Model Number	SFS001
Package Dimensions	29.7 x 11.5 x 7.9 cm
Material	Plastic
Color	Black
Size	532 ml
Special Features	TempShield Double Wall Vacuum Insulation
Package Weight	0.12 Kilograms
Batteries Required	No
Batteries Included	No
Material Care Instructions	手洗いのみ
Brand Name	Hydro Flask
Capacity	510 g
Item Weight	0.01 Pounds

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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