Overview
Insulated, flexible, and built to last.
Bike rides along the beach or snowshoeing in the backcountry — it's easy to stay hydrated on the go with our Wide Mouth Flex Cap. Designed with stainless steel pivots and a flexible strap, this cap moves when you do. Plus, it’s made with Honeycomb Insulation™ to keep drinks cold up to 24 hours or hot up to 12 — no matter what the weather’s doing outside.
Product Benefits
- Compatible with all Wide 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
Two words that kick off every adventure.
#HeyLetsGo
Overview & Specs
Overview
Insulated, flexible, and built to last.
Bike rides along the beach or snowshoeing in the backcountry — it's easy to stay hydrated on the go with our Wide Mouth Flex Cap. Designed with stainless steel pivots and a flexible strap, this cap moves when you do. Plus, it’s made with Honeycomb Insulation™ to keep drinks cold up to 24 hours or hot up to 12 — no matter what the weather’s doing outside.
Product Benefits
- Compatible with all Wide 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
Related Products
Reviews
Q & A
- Wide Mouth Flex Cap is rated out of 5 by 30.Rated 5 out of 5 by Sukofuchow from Great size for daily use Can hold water with no leakage. Hope the replacement rubber ring can be purchased if it give way.Date published: 2019-05-11Rated 5 out of 5 by Sarai18 from Stands out! Bought the bottom Cover & a new lid & love how it makes my yellow flask stand out !! The colors of the accessories I got are amazing too ! (:Date published: 2019-04-25Rated 5 out of 5 by banny from Works Very Well! I bought this about a month ago. It has been doing great! It never falls off and never leaks.Date published: 2019-03-24Rated 5 out of 5 by Two Sticks from Much better cap. My initial Hydro flask had the older cap and the second one this type cap. One day I dropped the orginal bottle and the old style cap split and was no longer of any use. This new type cap is in my view far better. One thought however. If you could offer a lanyard that could connect the cap and the bottle neck, it would be even better.Date published: 2018-07-21Rated 5 out of 5 by Josefina from Easier, better cap! Love my flex cap. Fits perfectly and no leaks. So much easier to carry than the regular cap. Perfect!Date published: 2018-03-27Rated 5 out of 5 by Outdoor Guy from This is a true upgrade I love this cap! It's quite an upgrade from the first generation. It feels more solid, higher quality, and more durable. And it looks really nice too. I haven't had any problems with it, like some of the negative reviews. I received this cap after my first gen cap broke and HF sent me this one as a warranty replacement. Thank you for standing behind your product!Date published: 2017-11-09Rated 5 out of 5 by mirandacr29 from Love my HydroFlask! I'm so pleased with my hydroflask! It's perfect because I love COLD water throughout the day & I love that it doesn't sweat and leave a ring of water on my counter! It's perfect :) I'm about to purchase my second one!!!!Date published: 2017-07-27Rated 4 out of 5 by Dawn21 from Great product but has started leaking The bottle is working great and i love now having to fill a water bottle 3 times a day but recently the cap has started to leak and its not great. If I have it in my bag on its side it leaks and it can get really annoying.Date published: 2018-06-09Rated 4 out of 5 by Becky G from Easy to Carry Love this style lid because it makes it so easy to carry on a hike or walking! Can also attach a carabiner onto it and attach it to a back pack of other pack! You do need to wash frequently as mold can gather in the corners of the lid. Good product overall.Date published: 2017-06-30Rated 3 out of 5 by luciee from Bottle/Lid Smell Ive have my hydroflasks for about a year, probably more, but the lid has gotten moldy and no matter how much I clean it, it never goes away. The smell is not very pleasing and the thought of drinking from something with mold isn't much better. I absolutely love the bottle itself though, but the lid needs work.Date published: 2019-06-12Rated 3 out of 5 by Gbiker18 from Great cap, but the seal stains easy Great bottle and the cap works well. I use it everyday as my regular drinking water bottle. I do add drink mixes, and they have caused mold to form in the lid. Once mold forms in the cap, it stains the seal, and can't be removed. The seal needs to be replaced in order to get rid of the stain. The cap comes clean with no issues. I bring my own water into work and refill this bottle one time each and every day, so it gets emptied at least 2 times every weekday. I have sanitized the seal several times, and just reused it. Today I again tried to clean it, and ended up damaging it in the process. I arrived on this site looking for a replacement gasket, and thought I would share my experience.Date published: 2019-02-08Rated 3 out of 5 by jan123 from great until rubber ring falls out Love the wide mouth bottle and the cap is very functional. However, once the plastic ring comes off, it's near impossible to secure it back to the cap. Since the cap doesn't seal and the bottle starts to leak. I wish Hydro Flask would take the lid back for repair or offer some tool to put back the ring. It's not environmental friendly to have to buy a new cap every time the ring comes off.Date published: 2018-09-24Rated 3 out of 5 by stzology from Moldy I love my hydro flask and have had it for well over a year. I have to keep purchasing new lids as cleaning them is IMPOSSIBLE. The creases in the lids get so gross.Date published: 2018-05-11Rated 2 out of 5 by DC New England from Keep an eye on the seal... The cap worked great until the seal fell out and was lost. I was bummed because this happened days after I received the new cap.Date published: 2019-04-28Rated 2 out of 5 by Jexx from Verdict is Still Out - Mine stinks like mildew! I love the 32 oz hydroflask and take it everywhere. One problem; the lid. it's gasket came loose, or is naturally loose, and moisture got behind it. I started to notice an awful mildew smell, like days old wet laundry. it was making me crazy, and so i cleaned it repeatedly, even using vinegar. nothing worked. that's when i discovered it was the lid. there's gotta be a better way! i can't stop using this thing now, i'm hooked! would love to hear from hydroflask about thisDate published: 2019-04-02Rated 2 out of 5 by conn from Great but the rubber on the inside is peeling :( I got a flask with this cap as a gift, but less than a year into using it, the rubber on this cap started peeling. Who knows how long I've been drinking rubber for? It has been an ongoing problem and most of the rubber has peeled off by now. I will be contacting hydroflask for a replacement soon.Date published: 2018-09-05Rated 2 out of 5 by starrymarina from Inner piece keeps getting mold I have gone through 2 wide mouth caps and the rubber seal piece keeps getting moldy. When I take out that piece not all the mold comes off of it....Date published: 2018-09-03Rated 2 out of 5 by rsolorio60 from It's ok, needs improvement. I got a customized yellow widemouth lid and bottle(green 32oz) from my girlfriend and I thought it was great! Only problem is that after the rubber seal fell off my lid my hydro flask does not provide the same effectiveness. It does keep my drinks cold or hot any longer :( I don't want to buy another because I don't need it, but I do wish they would make them better.Date published: 2018-04-25Rated 2 out of 5 by Alison19732003 from It leaks! This replacement lid leaks and it's worth the money.Date published: 2018-01-24Rated 2 out of 5 by Daniel Chua from Cap gasket falls out I bought an 18oz bottle with a flip lid for easy drinking but realised it doesn't keep the water warm for very long when I went trekking in the Himalayas a few years ago. So i just started using it as a normal water bottle for warm water in the office. Then a few months ago, the gasket fell out and I didnt notice until a few days after. Now it doesn't keep my water warm and it leaks! Had to dry out the contents of my teaching bag the other day after a leak. Man... You got to make sure the gasket stays in. Not gonna recommend this to anyone.Date published: 2017-10-18
Can you put this on a 20 oz. Wide-Mouth Water Bottle?
Yes, all of our Wide Mouth caps will fit our Wide Mouth bottles.Date published: 2019-06-01can you put this on the 16oz coffee flask
Yes, you can put the wide mouth flex cap on the coffee flasks.Date published: 2019-01-09what is the length and width of the cap strap?
The length of the wide mouth cap strap is 6 inches. The width is about a 1/2 inch,Date published: 2018-03-20My rubber gasket has mold how do I remove/ prevent mold in the lid gasket.
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/)Date published: 2019-04-30is this lid for a 40 oz hydro flask?
This is a wide mouth flask. You can use the wide mouth flex cap, flip cap, or straw cap for this flask.Date published: 2018-01-24Does this cap fit a Hydro Flask 18 oz.18/8 model F14262 flask? I lost the cap to mine and need a replacement.
This would be the wide mouth flask. The 18 oz can be either the standard mouth or the wide mouth flask. If the threads are on the outside of the flask it would be a wide mouth. If the cap threads inside the flask, it would be a standard mouth flask.Date published: 2018-01-15Hi there, I have a hydro flask 16oz wide mouth and shopping of a Wide Mouth Flex Cap, what should I buy? Thanks. Joy
Any wide mouth cap would fit this flask. You can get the wide mouth flex cap, flip cap, or straw cap.Date published: 2018-01-15Does the Wide Mouth Flex Cap have a clear plastic seal in the cap?
Yes, it should have a gasket. If yours is missing we can replace it by filling out a warranty form at www.hydroflask.com/warrantyDate published: 2018-03-08
