$9.95

Designed for ultimate portability and easy-carry comfort, the insulated Hydro Flask Wide-Mouth Flex Cap is a great addition or replacement for any wide-mouth Hydro Flask water bottle.

Color: Black
Quantity

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Features

  • Recyclable polypropylene #5 is BPA-free, phthalate-free and toxin-free
  • Honeycomb Insulationâ„¢ inside cap adds additional temperature control
  • Soft, flexible thermoplastic urethane (TPU) strap has stainless steel pivots

Imported.

View all Hydro Flask Water Bottle Accessories

Technical Specs

Best Use

Multisport

Material(s)

Recycled plastic

Dimensions

2.28 inches

Weight

2.5 ounces

Reviews
656 reviews with an average rating of 4.4 out of 5 stars

Ratings Snapshot

Product Rating

168 out of 203 (83%) reviewers recommend this product

Review this Product

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Most Helpful Favorable Review

5 reviews with an average rating of 5.0 out of 5 stars
Best top for wide mouth Hydroflask bottles!
VirginiaBeachMom2
8 years ago
I purchased a 20oz Hydroflask wide mouth bottle that came with a flip top lid. This lid seemed to leak a little if turned on its side and also had condensation when cold liquids are inside. This flip-top lid is not the best at insulating the drink inside because there is no insulation in the flip part of the lid. Therefore, I decided to replace the flip-top lid with the wide mouth flex cap and I love it! The handle is great for carrying and the lip is absolutely waterproof (no leakage) and it's the best at keeping your liquids really cold or hot! It is by far the best lid for any Hydroflask wide mouth bottle!
VirginiaBeachMom2
Virginia beach, VA
10 people found this review helpful

Most Helpful Critical Review

5 reviews with an average rating of 1.0 out of 5 stars
Lids leaks and does not keep water hot
mcmeyer69
7 years ago
Terrible for hot water but adequate for cold water containers. The seals leak and fall apart rapidly after using for keeping beverages hot. The sports lids do not keep beverages cold. The containers dent very easily and cannot withstand the shortest drop. Have to treat the fragile containers like a crate of eggs. I have two 40 oz HydroFlask insulated water bottles and discovered this cap seal comes apart when hot water in the container. I was hoping to use these insulated water bottles for winter hiking in the White Mountains, NH. As a result of the leaking lid, hot water leaks out of the container, leaks hot water over my back and then freezes bottle to the backpack. I have tried several times to reset the seal in the lid but continues to come apart and leak. The lids are adequate with cold water.
mcmeyer69
Quincy, MA, United States
11 people found this review helpful

Customer Images

Texasmom6
Fort Worth,Tx
Rated 5.0 out of 5 stars

The claims are TRUE and LOVE it!

5 years ago

[This review was collected as part of a promotion.] had to test this to see what all the Hype was about AND yes it do keep my Drink Cold infact i still had my ice and the soda was fresh like i just pour it in this Flask!what i love is that this is really REALLY easy to clean and it a Vacuum Insulated Stainless Steel Water Bottle Wide Mouth whatever in it stay Hot or Cold,my flask has a matte look and feel to it and with the Lifetime Warranty what not to Love about this awesome Wide Mouth Hydro Flask which by the Way is 18oz enough for your Coffee or whatever else you put in This and it is also Sweat Proof it is BPA & Toxin Free!you need one just to keep your water Cold period!

Yes , I recommend this product
Originally posted on hydroflask.com
KSB21
Indiana
Rated 5.0 out of 5 stars

The white cap discolors and looks nasty

2 years ago

This blue cap was a replacement for the white one that started to discolor and look really bad. The white handle got so bad that it always looked dirty no matter how much I cleaned it and with what that her friends poked fun of her for it.

Yes , I recommend this product
Originally posted on hydroflask.com
Crystal2019
Gilberstville, Pa
Rated 5.0 out of 5 stars

NO LEAKS! Made in the USA!

5 years ago

[This review was collected as part of a promotion.] I kept seeing everyone with these water bottles and I wondered what all the hype was about! Well now I know! I have now become one of those people who carry their water bottle everywhere they go! Over the years, I've owned several insulated water bottles with various lids and this one is definitely my favorite! I love my new Hydro Flask water bottle with the wide mouth flex cap! In the morning, I will fill my bottle up and hours later, it is still ICE cold! The wide mouth flex cap fits perfectly and I have had NO issues with leaking! I have put this bottle in both my gym bag and my purse and it has never leaked! I like this style lid with the strap because it makes it so easy to carry, especially when you are out on a walk! Hydro Flask with the wide mouth flex cap is my favorite new accessory!

Yes , I recommend this product
Originally posted on hydroflask.com
Leonna91
marion ohio
Rated 5.0 out of 5 stars

Great design

5 years ago

[This review was collected as part of a promotion.] I absolutely love how efficient this bottle is. It is also sweat proof which makes it even better. There is many times I have to watch what I put my drinks on due to it sweating on items. So this makes it so nice to have comfort in knowing it's safe to place around anything. I also love the fact it keeps your drink inside hot for a long period of time and also cold for a long period of time so your drink keeps fresh longer. It has a easy carry handle which makes it convenient and easy to bring along on hikes. It has stainless steel on the inside which helps provide the coolness and warmness for your drink. I also love the matte finish on it. It's not slippery and has great grip. I will definitely be buying more of these. Such a great design and so convenient. I recommend trying this out if you want a quality product.

Yes , I recommend this product
Originally posted on hydroflask.com
BestFlaskdesign
Tullahoma, TN
Rated 5.0 out of 5 stars

Perfect flask

5 years ago

[This review was collected as part of a promotion.] I bought this a month ago because it's so hot where I live that my ice always melts quickly and my drinks always become hot. With my new flask, my drinks are staying cold for hours. Very impressive! I absolutely love the wide mouth on it so I can get big pieces of ice in it and sometimes fruits to go into my water. There is no odor and no bacteria grows in it. Very sturdy, well built flask! Overall I'm very satisfied.

Yes , I recommend this product
Originally posted on hydroflask.com
VirginiaBeachMom2
Virginia beach, VA
Rated 5.0 out of 5 stars

Best top for wide mouth Hydroflask bottles!

8 years ago

I purchased a 20oz Hydroflask wide mouth bottle that came with a flip top lid. This lid seemed to leak a little if turned on its side and also had condensation when cold liquids are inside. This flip-top lid is not the best at insulating the drink inside because there is no insulation in the flip part of the lid. Therefore, I decided to replace the flip-top lid with the wide mouth flex cap and I love it! The handle is great for carrying and the lip is absolutely waterproof (no leakage) and it's the best at keeping your liquids really cold or hot! It is by far the best lid for any Hydroflask wide mouth bottle!

Yes , I recommend this product
Helpful?
Gbiker18
Milwaukee
Rated 3.0 out of 5 stars

Great cap, but the seal stains easy

6 years ago

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.

No, I do not recommend this product
Originally posted on hydroflask.com
Azhom2000
De Soto, MO
Rated 5.0 out of 5 stars

Works like a champ

5 years ago

[This review was collected as part of a promotion.] This is the first bottle/cap that I have had that actually keeps my coffee hot! And it does NOT leak! It is almost like an old fashioned thermos like grandpa had... only in a more practical size. I cant wait to try it out for a cold drink!

Yes , I recommend this product
Originally posted on hydroflask.com
Nick
Denver, CO, United States
Rated 3.0 out of 5 stars

Good Insulation and Convenient Handle

8 years ago

Overall I like this product. The insulation will keep ice longer than I will ever need it to and the handle makes it convenient to carry. The issue I have is the rubber seal isn't removeable so if anything other than water is stored in the bottle, especially hot coffee or tea, it is impossible to ever get the smell cleaned out of the lid. I tried hot water and soap, soaking in baking soda and water overnight, baking soda paste, and even my PBW cleaner that I use for my Brewing equipment that works on everything, but since it cannot get underneath the seal it will not get it clean. So, great performance as long as you only use it for water. Three stars.

Yes , I recommend this product
Helpful?
Anonymous
Lebanon OR
Rated 5.0 out of 5 stars

I love it!

5 years ago

[This review was collected as part of a promotion.] I just love this Hydroflask! It's the perfect size. My husband has stage 4 lung cancer and is going for chemo treatments. His favorite thing right now is crushed ice, as it really helps his throat. This Hydroflask is perfect to put his crushed ice in for our trips to the cancer center. He is able to use it for the whole day and it keeps his crushed ice just the way he likes it. Such a huge blessing for what we are dealing with. When we got home after being gone the whole day, I looked inside and none was melted! This is an amazing product!!

Yes , I recommend this product
Originally posted on hydroflask.com
1 - 10 of 656 Reviews

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