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Standard Mouth Flex Cap

$9.95
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Standard Mouth Flex Cap

$9.95
Lifetime
$9.95
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Overview

Moves with you.

Strong yet flexible, our Standard Mouth Flex Cap is the perfect companion for spontaneous campouts, epic road trips, and everything in between. Made with stainless steel pivots and an easy-to-carry strap, this cap has Honeycomb Insulation™ to help keep your drinks cold for up to 24 hours or hot up to 12. Pair it with any of our Standard Mouth bottles.

Product Benefits

  • Compatible with all Standard Mouth bottles
  • Honeycomb Insulation™ helps keep cold drinks cold and hot drinks hot
  • Durable, stainless steel pivots allow the strap to move easily
  • BPA-Free and Phthalate-Free
  • Lifetime Warranty

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Overview & Specs

Overview

Moves with you.

Strong yet flexible, our Standard Mouth Flex Cap is the perfect companion for spontaneous campouts, epic road trips, and everything in between. Made with stainless steel pivots and an easy-to-carry strap, this cap has Honeycomb Insulation™ to help keep your drinks cold for up to 24 hours or hot up to 12. Pair it with any of our Standard Mouth bottles.

Product Benefits

  • Compatible with all Standard Mouth bottles
  • Honeycomb Insulation™ helps keep cold drinks cold and hot drinks hot
  • Durable, stainless steel pivots allow the strap to move easily
  • BPA-Free and Phthalate-Free
  • Lifetime Warranty

Reviews/Q&A

  • Reviews

  • Q & A

  • Standard Mouth Flex Cap is rated 3.1 out of 5 by 14.
    Rated 5 out of 5 by from Replacement for a failed cap I purchased this lid last month to replace the lid I had because it was leaking and also holding water within the lid it’s self. The Hydro flask was only about three months old when this happened. Hopefully I have better luck with this one.
    Date published: 2019-05-14
    Rated 5 out of 5 by from Just Fantastic‼️ I love my HydroFlask! It’s the best bottle I’ve ever seen!!!
    Date published: 2019-05-01
    Rated 5 out of 5 by from Flex Cap ROCKS! I have been using the HydroFlask for several years. I never like the complicated tops because they are hard to clean. I do like the standard cap but last year I bought my daughters a new bottle with flex cap
    Date published: 2017-04-28
    Rated 4 out of 5 by from Like but need options I really like this lid/strap for general use - at the gym, park, backyard, beach. Specifically, I like that the handle can be tucked down or lifted up. However, I would like a rigid lid option in addition to this one. When I kayak, I need to be able to clip the lid with a carabiner, and the soft strap would easily shred. I don't want to use the sport cap while kayaking, as it has no cover for the part that goes in the mouth. (who knows what's in the water???) I don't want to see this lid option go away, just a new one added... please! Love Hydro Flask!
    Date published: 2017-09-25
    Rated 4 out of 5 by from LOVE the handle...perfect to carry Love this top, but it would be even better if it was a flip top with the handle.....waiting because I know it's on the way!
    Date published: 2017-07-04
    Rated 4 out of 5 by from Good start now add the flip top drinking as well I have bought 6 flasks for family members. they are loved. This handle is a great idea, however I am waiting for the lid that has the handle and the flip top for drinking. When you get this two in one I will be buying them along with lots of friends who are waiting for the same thing. It would be nice to have color but we can do with out for now. We have recommended your produce to friends, who have choked on the cost but once they have tried them [20 oz] they order another.
    Date published: 2017-03-09
    Rated 3 out of 5 by from Broken strap! I love my hydro flask! But one of the sliver disks that hold the strap broke off! Now I need to order a new lid!
    Date published: 2019-02-14
    Rated 3 out of 5 by from It's great but a bit annoying I love the conveinance of having my drinks staying cold in my hydroflask, but I do have an issue with this particular cap. The cap is great but it makes loud squeaking noises when opening and closing which I assumed was from the wet black rubber ring at the top. I took it out and it stopped squeaking but I left it in because I noticed that when I flipped the bottle water leaked out. Is there anyway to stop the squeaking noises when opening and closing my hydroflask?
    Date published: 2019-01-18
    Rated 3 out of 5 by from It WAS good.. I bought my first hydroflask (21 oz standard mouth) a week ago and I loved this cap, but one of the stainless steel pivots now squeaks when I move the strap and it's only one side, so the other is fine but this one is hard to move the strap on. Maybe just a defect?
    Date published: 2017-12-23
    Rated 2 out of 5 by from Doesn’t protect from germs Notice how the silver ring is exposed when the lid is on? That is where you put your mouth when you drink. Why wouldn’t they design the lid to cover where my mouth goes? Imagine places like an airplane or other public situations where your bottle makes contact with the real world? Make the plastic nest over the silver metal ring...
    Date published: 2019-04-01
    Rated 2 out of 5 by from No my favorite my cold water gets warm really fast with this cap, the only good thing about this cap is that the part that I put in my mouth is not exposed to everything in the environment as the other cap.
    Date published: 2018-08-27
    Rated 2 out of 5 by from Sport cap is not reliable While the bottle is great, the sport cap is hard to push in and pull out. My daughter had it leak all over her backpack despite banging the heel of her hand on the cap to close. The standard cap is a pain to use. It would be good if Hydro Flask were to make a straw cap for the standard mouth bottle that is reliable and not rely on third party companies to develop these (those are not any good either). And while the large bottle is fine, it is not something you want to lug around while you are working out.
    Date published: 2018-04-07
    Rated 1 out of 5 by from Trash I had it for about a day. I dropped it on the hinge and it fell off.
    Date published: 2019-02-09
    Rated 1 out of 5 by from Standard Cap Does Not Fit Old Model I bought the standard cap thinking that it would fit my old 24 oz. standard mouth Hydroflask that I purchased back in 2015, but the new standard cap is just a tad bigger than my old one. So if I wanted to replace the broken lid on my bottle, I would have to buy a whole new bottle aka spend more money.
    Date published: 2017-09-11
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  • Will this cap fit 25 oz Wine Bottle?

    Asked by: Sue95
    Yes, the Standard Mouth Flex Cap will fit the 25oz Wine Bottles.
    Answered by: Consumer Service
    Date published: 2019-06-13

    Our 21 oz, insulated flasks are our favs but over time, water got into the caps and the standard rubber ring developed mold.  Took it apart & cleaned it, but the seal is discolored & water is difficult to remove from cap.  Will new design solve this? 

    Asked by: Nancy39
    We'd be happy to replace your cap for you under our Lifetime Warranty. You can fill out a warranty claim here: (http://www.hydroflask.com/warranty/)
    Answered by: customer servcie
    Date published: 2018-05-01

    Does the standard mouth flex cap come in white?

    Asked by: spyro22
    The white standard mouth flex cap can only be purchased through the MyHydro website. You would have to customize the flask to get the white cap.
    Answered by: customer servcie
    Date published: 2018-03-28

    Is this lid leak proof?

    Asked by: JordanK
    The flex cap is more of the leak proof option because it has no openings in the caps.
    Answered by: Hydro Flask Customer Team
    Date published: 2018-07-08

    My cap is filled with water, is it supposed to be or is it a sign it has a crack?

    Asked by: BarryT
    We'd be happy to replace your cap for you under our Lifetime Warranty. You can fill out a warranty claim here: (http://www.hydroflask.com/warranty/)
    Answered by: Hydro Flask Customer Team
    Date published: 2018-01-29

    What materials are the cap and strap made of? My girlfriend has an allergy to certain rubber and latex. She has a small rash on her hand that we're afraid is coming from holding the lid to her flask.

    Asked by: Maja88
    All of our caps are made out of BPA/BPS free polypropylene. All Hydro Flask products are certified by the US Consumer Product Safety Commission to meet or exceed government regulations. The straws for our Straw Lid are made out of low density, BPA/BPS free polyethylene.
    Answered by: Hydro Flask Customer Team
    Date published: 2018-10-23

    Will this fit my 25oz wine bottle hydro flask?

    Asked by: Bing
    Yes any standard mouth cap will fit the wine flask.
    Answered by: Hydro Flask Customer Team
    Date published: 2019-03-11

    Will this lid fit the 25oz wine bottle?

    Asked by: sierra
    Yes, it would.
    Answered by: Hydro Flask Customer Team
    Date published: 2018-01-02
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