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 out of 5 by 96.Rated 5 out of 5 by Y2kbird from Perfect form factor This is a perfect size, excellant grippabilty and really does keep ice for hours and hours and hours and a few more hours. This will be used daily and enjoyed for years. Ifnininly had a box full I could give to friends for christmas.Date published: 2019-10-13Rated 5 out of 5 by BKTran from Best water bottle on the market The Hydroflask has many imitators but is the best water bottle out there right now. It keeps liquids hot all morning and cold for what seems like days. There's no condensation on the outside or bottom of the bottle either when you fill it with ice. The lid is completely leak-proof and doesn't have annoying flaps, mechanisms or crevices that are super hard to clean.Date published: 2019-10-11Rated 5 out of 5 by Subielove12 from Super strong and durable! The cap withstands amazingly! I usually take my bottles to the gym and toss and swing them around everywhere and it has not even budged to wear down at all! Keeps my drinks cold and secure! I wouldn’t go with any other brand, it definitely holds up to my standards.Date published: 2019-10-09Rated 5 out of 5 by GriceldaC from Greatest Water Bottle Ever! I am very pleased with this Hydro Flask! The size is prefect to keep in my everyday bag, and it keeps my drink cool/hot for hours. The color doesn't fade after many washes which is a plus. It is also durable and I love the color! I am definitely happy with it.Date published: 2019-10-08Rated 5 out of 5 by JWalt from Smart and simple The flex cap is great - it’s not a stiff loop like some, so it’s comfortable to carry. Long enough to be usable but not to dangle, which is good. Feel is great and it insulates really well - very little loss of temp at the neck.Date published: 2019-10-08Rated 5 out of 5 by PowerSerg007 from Hydro Flask Standard Mouth Flex Cap This cap has been in use for over a month now. Its been through workouts, bike riding and just back and forth to work. The cap has held up well through all of these activities. Stays in shape through dishwashing and drying but I think it may be better to hand wash. Given my activities, I think i would prefer the cap with mouth piece so I don't have to unscrew the cap every time, just my preference. Construction appears good so far so no issues. Price is not to bad so I may just have to purchase one extraDate published: 2019-10-07Rated 5 out of 5 by Noackpa from Love Hydro Flask Just like my other Hydro Flasks, I love this water bottle equally. I have used this one for both hot and cold liquids and love it. I am amazed at how I can put ice in it in the am and add water throughout the day and there is still ice in it to keep my new water cold. I don't think there will ever be a reason to use any other water bottle than a hydro flask and this one with a standard mouth cap is probably my new favorite!Date published: 2019-10-07Rated 5 out of 5 by Tamen from Leak Proof Cap The standard mouth flex cap for the Hydroflask fits perfectly and tightly. The standard mouth flex cap doesn't leak and keeps drinks cold/hot and secure while traveling, exercising, or to use as a spill proof container at work.Date published: 2019-10-06Rated 5 out of 5 by T414 from I love this product I love how this product keeps cold drinks cold and hot drinks hot for hours especially cause I’m a bus driver and work long hours it really helps, I even told my brother about it and now he want one...thanks again.Date published: 2019-10-06Rated 5 out of 5 by Danam from Great product I really like these insulated water bottles. They keep my water and ice cold for hours. The flex caps are easy to use. The hydro flask is light to carry when walking and not bulky. I also like that the cap has a loop that makes it easy to carry.Date published: 2019-10-06Rated 5 out of 5 by Patriotsfan from Fits 21oz Hydro Flask Bottle perfectly If you need a replacement lid for your Hydro Flask this fits the 21oz perfectly. No leakage at all. Also fits my 24 oz bottle. Made well and will last as long as I don't lose the bottle. I like the top loop for carrying and strapping to my backpack. I hand wash but could toss in dishwasher basket if you have one.Date published: 2019-10-06Rated 5 out of 5 by Keesa76 from Coffee stays hot I love my new flex cap bottle! I put my coffee in it everyday and it stays hot til the last drop! The big bonus is my hands stay cool! It’s stylish and holds more than 2 cups of coffee with creamer! Get one today!Date published: 2019-10-05Rated 5 out of 5 by Frioman007 from Great water bottle. I bought this Hydroflask for my daughter to use in track and cross country. She has tried servers different water bottles, but now will only use this one. She says it keeps water cold all day and even at the end of the day still has ice being outside. I highly recommend this for anyone whom is looking for a great water bottle.Date published: 2019-10-05Rated 5 out of 5 by sjrpsulion from Standard Mouth Flex Cap – Black My Flex Cap beverage container came with an old style conventional, hard plastic durable cap. The construction and durability of this beverage container is outstanding. I am very confident should this container drop from six feet to the floor, the cap and body would withstand any leakage or damage. This is a great cap and container for hiking, camping and everyday travel. The integrity of the cap will keep your liquids cold or hot, at the desired temperature for a reasonable amount of time. The cap fits well on all my standard water bottles. It’s very easy to attach, turn and protect your contents. It makes for a good tight fit with no leaks. It takes a little effort to open cap with one hand yet still manageable. Handle is well attached. I give this product a 5-STAR Rating for its design, integrity and construction.Date published: 2019-10-04Rated 5 out of 5 by Sara R from The greatest bottle in the world! I absolutely love my Hydro Flask. This is the ultimate bottle for keeping your drinks cold and refreshing all day and all night long! We love Hydro Flask so much that we have added three more to our collection because honestly in a family of five just one or two is just not gunna cut it when you have a product this good!Date published: 2019-10-04Rated 5 out of 5 by Bossman 21 from No Spills, Icy Cold! The cap came with a matching stainless steel double walled water bottle. The combination of this cap and bottle makes it easy to carry and the cap fits nice and tight. I noticed it never leaks! Having a cap made in this fashion really is helpful in case I drop it or want to stash it in a bag. It helps the bottle keep my icy cold drinks safe and so very cold for hours! I look forward to using it for hot beverages this winter!Date published: 2019-10-03Rated 5 out of 5 by Boholady61 from Great quality I received this item about 2 weeks ago. The Hydro Flask is of great quality and well made. I really like the twist on cap and wide open mouth on the flask. Makes it easy to pour and add ice cubes for cold drinks I highly recommend the Hydro Flask.Date published: 2019-10-03Rated 5 out of 5 by misswoman from Ice Cold. Wow! Wow! I ordered the standard size Hydro Flask and we could not be more pleased. Since we live in a very hot climate, having our water remain ice cold is a big deal. You tend to run out of energy easily here, and taking a sip of ice cold water wakes you up. I even tried to check it's claim of staying cold for 24 hours, and it turned out to be true! I purposely left it inside the car of the hottest garage in the free world, mine! It absolutely stayed cold as it claimed. The exterior has a textured feel that isn't slippery at all. It fit easily into the bottle slot of my car. And no kidding, I've seen interior temps of 104 inside. It's vital in Tx to keep hydrated, and to remain ice cold is such a bonus. Awesome water bottle!!Date published: 2019-10-03Rated 5 out of 5 by RDCH from Superior Construction to Keep Your Drinks Cold/Hot The Hydroflask needs no introduction and pretty much everyone I know owns one. But I want to stress how this stainless steel bottle is superior to any other bottle I've used when it comes to keeping the temperature of water for a longer period of time. It keeps liquids hot for longer than 12 hours and keeps liquids cold for up to 24 hours. Although the Hydroflask is prone to nicks and dents from rough handling, it won't ever shatter or break on you. The construction is extremely durable and well made. The flex cap that comes with this bottle is also pretty handy, no pun intended. The handle makes it convenient to carry around and the seal is pretty leak-proof. It's also pretty durable and the handle hasn't come off on me yet. I have never had any issues with leakage when it comes to this cap if it's tightened correctly on my Hydroflask. In addition, I love the customization Hydroflask has with their many colors and accessories. Changing out caps for different occasions and situations is convenient and being able to make your own Hydroflask stand out is pretty fun. Cleaning is a little tedious, especially when it comes to the standard mouth Hydroflask. I recommend getting a bottle brush cleaner that fits into the small opening in order to effectively clean the interior of the bottle. For those who want an easier time of cleaning, I would probably recommend the wide mouth bottle to them for easier cleaning access. Overall, Hydroflask is a bottle I use daily and I highly recommend it to anyone who enjoys drinking hot and/or cold water!Date published: 2019-10-02Rated 5 out of 5 by SharlaK from YAY Hydroflask !!! The Hydroflask standard mouth Flex Cap is the bomb! Keeps my Hydroflask handy for both hot and cold portable refreshment! Maintains cold or hot temperatures well and for a very long period of time. BPA free and easy to clean. I highly recommend this product!Date published: 2019-10-02
Will this cap fit 25 oz Wine Bottle?
Yes, the Standard Mouth Flex Cap will fit the 25oz Wine Bottles.Date published: 2019-06-13Our 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?
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: 2018-05-01Does the standard mouth flex cap come in white?
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.Date published: 2018-03-28Is this lid leak proof?
The flex cap is more of the leak proof option because it has no openings in the caps.Date published: 2018-07-08My cap is filled with water, is it supposed to be or is it a sign it has a crack?
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: 2018-01-29What 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.
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.Date published: 2018-10-23Will this fit my 25oz wine bottle hydro flask?
Yes any standard mouth cap will fit the wine flask.Date published: 2019-03-11Will this lid fit the 25oz wine bottle?
Yes, it would.Date published: 2018-01-02
