Customer Reviews Hydro Flask Standard Mouth Flex Straw Cap

The cap works as advertised. When using the straw, try not filling the bottle past the max fill line. Doing this keeps the liquid from covering the air hole. Also when twisting the cap on. Keep the straw lid opened to release air.

Keeps my drink cold while cycling in 80' weather. Great customer service. Very durable

Love it! It makes my flask so much more user friendly. I love the flex straw on my 40 oz, but it can be a bit unwieldy because of its size.

Nice drinking system, doesn't add weight. Convenient and easiest to use.

I take my flask everywhere, since it makes it easier to drink throughout the day. And night. I like this top because it's easy on the hand to carry, and easy to close so it won't leak, and easy to drink from.

Glad I added this cap when I bought the Flask. It's especially convenient when I'm driving. I'm a professional musician, and it's also convenient when I'm onstage.

Fantastic! dishwasher safe. easy to size and use and wash

Love that it locks when it's closed. Feels very sturdy and secure. If it tips over while open it will spill so make sure to close it. Handle js sturdy and made of silicone. Mouth piece is plastic.

This little gem does not leak. Not a bit!!! Easy to open, close and clean! Who could ask for anything more..

It fits my 21 Oz hydro flask perfectly! It does not leak, the handle is a nice soft rubber that feels good to hold and fits great!!! Now I can switch back and forth between the standard cap or this straw cap! Highly recommended!!

This Hydro Flask Flex Straw Cap is a great addition for my Standard Mouth Hydro Flask bottle! It is a flip and sip leak proof cap and straw that is quick to set up and convenient to use. Included are two straws and easy to follow instructions. I love that I can drink my cold water quick and easy with a flip of the cap! It is also BPA-free and dishwasher safe. I definitely recommend this great cap and straw!

I've been using this daily since I've received it to make iced coffees in. I love it! The ice cubes stay frozen for hours in it. I've literally forgotten it at home after I left for work accidentally & when I returned home the ice cubes were still cubes. The straws work great, they don't make any noise so I know they are a good fit. Closes tightly and no leaks. Love it!

This Hydro Flask standard flex straw cap is terrific for use with my Hydro Flask 21 oz standard bottle. This cap is perfect for drinking my cold beverages when traveling or exercising. This fits the cup holders in the car and my exercise bike.

This lid is the ideal complement for my bottle, it does not spill a single drop of my drink, just like the bottle it exceeded my expectations, it is perfect, it preserves the temperature of the drink that the bottle carries, very easy and simple to put the straw on , I loved!!

This fits my 21 oz. Hydro Flask perfectly and I have had no issues with it leaking. Cut the straw to the desired length and screw on, what could be easier? Oh yes, even brushes to keep the straws clean for long-term using.

This lid is great. It's heavy duty and rugged and acts as a nice handle. It fits perfectly in the Hydroflask 21oz. The package has instructions on how and where to cut to fit. I use this top when drinking cool beverages and the standard top for hot.

I got this because I have the standard mouth aluminum water bottle, and where I work I prefer a straw to a sip style bottle as it's easier to grab a quick drink with, and I like that it seals easily, as the spout securely flips down. The rubber screw threads fit perfectly into my cup, making the cup able to maintain the cold temperatures of my drink. This lid came with 2 straws I could cut and adjust to the right size to fit my particular cup, which is great! I like that I have options, and that there is an extra straw in case mine gets lost while cleaning, or too dirty, or broken or something. I also like that the instructions for trimming the straw to the correct length for my cup are clearly written on the back of the packaging and have visuals included with the instructions. I am extremely happy that i have this, and plan on getting one for my husband's cup, and have recommended this optional accessory to others!

We got this to go with our standard hydroflask bottle and it's been great. Our 6 year old carries this bottle so having a flip top straw lid helps her to handle the water bottle and not have to use the lid that comes with the bottle that is a screw top.

I received a Standard Flex Straw cap black to test an review . It fits my Hydro Flax flask very well and doesn't leak I flip and sip out of the straw cap. The strap attached to the cap makes it easy to carry anywhere.

I love this straw cap! I am so much better about hydrating when I can drink through a straw, so I was excited about getting this cap. It was super easy to cut the straw to the right size. And I love that it came with 2 straws, so I can have a backup when I don't have time to thoroughly clean the straw out. It let's the perfect amount of water through too. It's perfect!

Good top I got with my hydro flask. I like that you can buy different tops and straws to go with your hydro flask. I like the strong durable straws that come with it. Thank you hydro flask for a great product!

I've been using this Hydro Flask - Standard Flex Straw Cap for a few weeks and have zero complaints about using it so far. I would recommend it to a friend if they were interested in a new cap they wanted to us.

Sometimes I get tired of opening and closing the lid on the flask. I. The car I drop them sometimes. This makes it simple. Lid stays on and easy access. The straws are think and solid. Not worried about them breaking. The opening on the cap is not to big or small. Perfect for gulping some water. Easy to trim the straw for the right height of the bottle.

recieved this in addition to my Hydro Flask bottle. Fits it perfect and I love the additional straws that came with it. Keeps the bottle sealed very well and keeps the drinks cold and hot. This should last a lifetime.

This was a fantastic addition to my hydro flask bottle. This makes it so much easier to enjoy my drink on the go. Honestly have no idea why more companies don't offer something like this. If you are on the go a lot this is a most have for your bottle.