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Hydro Flask
Standard Flex Straw Cap

4.197718631178708 out of 5 stars
263 Reviews
$14.95
Color:Black

Size:

Quantity


Hydro Flask Standard Flex Straw Cap

The Hydro Flask Standard Flex Straw Cap fits on standard mouth bottles to help avoid leaks so that we can enjoy ice-cold water while on the go.


Details

  • Durable construction handles daily use and cleaning
  • Compatible with standard mouth Hydro Flask bottles
  • Item #HYFZ02O
Material
polyproplyene (BPA-free)
Compatibility
Hydro Flask standard mouth bottles
Activity
hike, camp, training, casual
Manufacturer Warranty
limited lifetime

What do you think about this product?

Overall Rating

4 based on 263 ratings

Review Summary

1 Stars - 18 reviews
2 Stars - 13 reviews
3 Stars - 33 reviews
4 Stars - 34 reviews
5 Stars - 165 reviews

Customer Images

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5 out of 5 stars

February 13, 2025

Good unit

[This review was collected as part of a promotion.] Nice straw,no leaking carry handle and much more sanitary than the pop up variety.

Karen C.
hydroflask.com

Originally reviewed on hydroflask.com

5 out of 5 stars

February 5, 2025

I don’t understand how the

[This review was collected as part of a promotion.] I don’t understand how the straws are supposed to be usef

Jennifer B.
hydroflask.com

Originally reviewed on hydroflask.com

5 out of 5 stars

February 4, 2025

My go to mug!

[This review was collected as part of a promotion.] I sadly lost my last trusty hydro flask on a flight. I got this new cup with the straw and another lid to use it for hot and cold. It's perfect!

Carly P.
hydroflask.com

Originally reviewed on hydroflask.com

4 out of 5 stars

January 30, 2025

Good cap, easy to clean. Small straw, tiny lever.

[This review was collected as part of a promotion.] So far, I like this cap quite a bit. I really appreciate that it doesn't have a recessed gasket like the wide-mouth ones, which makes it a lot easier to take apart for cleaning. The newer wide-mouth ones are annoying to open because there's no place to grip to twist, but my hand goes around the narrow-mouth ones so for me they're easy to open. (I do miss the gripping ring on the older ones). Notable downside 1: The straw is much narrower than on the wide mouth version. It's significantly slower to drink from. Downside 2: The little lever op top to pull it open is small and vertical. This makes it less efficient as a lever, and also it's less obvious which direction the cap is facing by touch. (This doesn't seem like a big deal, but over the course of a whole day it is slightly annoying)

Ashley P.
hydroflask.com

Originally reviewed on hydroflask.com

5 out of 5 stars

January 29, 2025

Thanks a lot for sending

[This review was collected as part of a promotion.] Thanks a lot for sending me this cap. It's much better to drink while you are walking.

Cristina M.
hydroflask.com

Originally reviewed on hydroflask.com

4 out of 5 stars

December 31, 2024

Good bottle

[This review was collected as part of a promotion.] Good bottle, like the color and size. I have several varieties of these and I like them but they do dent easily.

Ben B.
hydroflask.com

Originally reviewed on hydroflask.com

5 out of 5 stars

December 11, 2024

Flex Straw Cap

[This review was collected as part of a promotion.] I received this cap as a replacement for the standard cap which was leaking and is no longer available. I am very pleased with this cap - much easier to drink from, doesn't leak and easier to clean. The replacement / exchange proces was simple, smooth and quick.

Salvatore M.
hydroflask.com

Originally reviewed on hydroflask.com

5 out of 5 stars

December 8, 2024

I’m sure the cap was

[This review was collected as part of a promotion.] I’m sure the cap was perfect, but I bought the wrong size. I guess I needed a wide mouth.

Maxine D.
hydroflask.com

Originally reviewed on hydroflask.com

5 out of 5 stars

November 27, 2024

Hydro Flask Straw Mouthpiece

[This review was collected as part of a promotion.] Works great, fits my hydro flask perfectly! Thank you

Robert D.
hydroflask.com

Originally reviewed on hydroflask.com

4 out of 5 stars

November 26, 2024

Cap with mold??

I purchase the Flex Straw Cap Standard mouth for my 18oz bottle. I have only used it for water, 3 days a week and it looks like it is getting mold? I empty it after each use, and let it air dry. Is there anything I can do to save it? I love using it.

Arlene B.
hydroflask.com

Originally reviewed on hydroflask.com

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Learn more about Standard Flex Straw Cap