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Hydro Flask
Standard Mouth Flex Cap

4.279569892473118 out of 5 stars
93 Reviews
$9.95
Color:Black

Size:

Quantity

Only 4 In stock


Standard Mouth Flex Cap

Your water bottle's original cap could be anywhere from Acadia to Yosemite, and instead of searching every rock on each peak, you're going to opt for Hydro Flask's Standard Mouth Flex Cap. Its stainless steel construction includes Honeycomb insulation to help you drinks stay cold or hot longer. The flexible loop is durable and convenient for hikes and bikes to summer concerts.

Details

  • Water bottle cap fits Hydro Flask Standard bottles
  • Stainless steel construction with Honeycomb insulation
  • Flexible loop ideal for outdoorsy adventures
  • Item #HYF001P
Material
stainless steel
Manufacturer Warranty
lifetime

What do you think about this product?

Overall Rating

4.5 based on 93 ratings

Review Summary

1 Stars - 7 reviews
2 Stars - 6 reviews
3 Stars - 8 reviews
4 Stars - 5 reviews
5 Stars - 67 reviews

Customer Images

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5 out of 5 stars

March 25, 2025

Yay for replacement cap options!

[This review was collected as part of a promotion.] Yay for replacement cap options! I love my HydroFlask water bottle!

Marcie M.
hydroflask.com

Originally reviewed on hydroflask.com

1 out of 5 stars

March 21, 2025

Standard Mouth Flex Cap - Black,

[This review was collected as part of a promotion.] Wrong size. I need a smaller cap for one of the very first hydro flasks made - when then just came out in Bend, OR. I was very specific about size. It is less than one inch in diameter inside the lid. Are these lids still available?

Chris M.
hydroflask.com

Originally reviewed on hydroflask.com

5 out of 5 stars

February 26, 2025

Cap replacement went smoothly and

[This review was collected as part of a promotion.] Cap replacement went smoothly and appreciated hydro flask lifetime warranty

Frenz C.
hydroflask.com

Originally reviewed on hydroflask.com

5 out of 5 stars

January 22, 2025

working great keeping food warm

[This review was collected as part of a promotion.] working great keeping food warm went camping overnight in -10 weather made oat meal night before and it was nice and warm in the morning

Michael M.
hydroflask.com

Originally reviewed on hydroflask.com

5 out of 5 stars

January 10, 2025

Give yourself options

[This review was collected as part of a promotion.] Buy your flask with the flex straw and add the flex cap to your order. Glad I have the flex cap option when I'm traveling or at work to take a break from my straw cap. Happy I made the choice to add this to my order.

Amber G.
hydroflask.com

Originally reviewed on hydroflask.com

2 out of 5 stars

January 6, 2025

The handle is not very robust.

[This review was collected as part of a promotion.] The handle of the cap broke within 2 weeks of using it. It is the second cap that we have used. This has not happened with our other hydro flask water bottle.

Sherry L.
hydroflask.com

Originally reviewed on hydroflask.com

5 out of 5 stars

November 6, 2024

Bottle cap life time guarantee replacement.

[This review was collected as part of a promotion.] I dropped water bottle and cracked the cap. Life time guarantee replacement of water bottle cap. Even though it was my fault. Wow.

Jeffery V.
hydroflask.com

Originally reviewed on hydroflask.com

5 out of 5 stars

November 3, 2024

Thank you for making it

[This review was collected as part of a promotion.] Thank you for making it so easy to replace my broken cap!

Regina K.
hydroflask.com

Originally reviewed on hydroflask.com

5 out of 5 stars

September 26, 2024

Great quality, fits well!

[This review was collected as part of a promotion.] Wanted to replace the top of my older hydroflask because the ring was getting gross and stained. I was worried this newer top wouldn’t fit, but it did! Seals well, no leaking

Madison C.
hydroflask.com

Originally reviewed on hydroflask.com

5 out of 5 stars

September 7, 2024

Love this company

[This review was collected as part of a promotion.] When they say lifetime guarantee…they MEAN IT! Love this company! I have bottle, and cups I use constantly!

Melanie P.
hydroflask.com

Originally reviewed on hydroflask.com

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