MorlaStandard Size Lid for Hydro Flask Standard Water Bottle and Simple Modern Ascent Bottle.

Fits 21 oz standard mouth Hydro Flask perfectly. The gasket seal allows a solid fit. There is absolutely no leaking.

Had this for a week. Loved it. Hand washed only and only used 2-3 times. Then I noticed a big crack inside the plastic, near the straw, and it now makes a whistling sound when I drink and I can feel the leakage. Spills in my bag now too if bottle lays on its side. Loved it so much for the first couple of days that I bought another. Then this one broke. A few weeks later the same thing happened with the second lid (same seller, same manufacturer). I don’t recommend.

I like that it perfectly fits both my 24 and 21 inch standard mouth Hydro Flask bottles and it does not leak at all. The only downside it that its hard to drink from as the mouth piece creates a vacuum effect preventing you from being able to drink more than a tiny sip at a time. This top is useful if you only use it to take period sips of water throughout the day (for example i’m a teacher and sip small amounts of water during lectures to prevent my mouth and throat from feeling dry). But if you are exercising or in need of a hydrating and refreshing gulp of cold water I would suggest looking for a top that allows you to swallow larger amounts of water at a time.

It fits my simple modern 17 Oz bottle perfectly the straws are way bigger than the bottle but they can be cut to fit the bottle.I received a defective lid but customer service was great sent me a replacement right away and there were no problems with the one I received.I would recommend this lid.

Bought 3 for our HF bottles. The first two work amazing, they don’t leak but this third one leaks. Will contact seller ASAPUPDATE: THEY SENT ME A NEW ONE ANS IT WORKS FINE!

Works great with my hydroflask bottle, comes with straws and a brush to clean. Totally worth the money!

I got this as over the years I've come to find that I prefer to drink water from a straw. Mainly because I find it easier to consume higher volumes at once (so long as you don't overdo it) and my teeth have become more sensitive over the years. I got a tal 24oz hydroflastk which was a great size for me to carry in my backpack, given its slender profile, but I still wanted a straw attachment. This one is great! The cap screws in perfectly and the straw was easy to fit and goes right to the bottom of the long bottle. It's also easy to detach for cleaning. The handle is comfortable enough, but I haven't used the little carabiner clip. Equally, I can't attest to if it's 100% leakproof or not as I don't trust any straw solution to be completely leakproof. So I always carry it upright in my bag. But I have done the infomercial style test of filling it up and tipping it over and nothing came out. I just don't necessarily trust it long-term sloshing around in my bag. All in all a great solution if you prefer drinking water from a straw.

It was great at first. It fits incredibly well in my 32oz klean kanteen with a narrow mouth (honestly better than the klean kanteen caps that I've tried) and was easy to drink from. I also think it kept the water as cold as the other caps that I've tried. However, about a week after using it everyday, it stopped working. I would flip it open and just suck up air. At first I would be able to flip it back down and then up again and that would fix it but then it stopped work altogether. I think it's because of the little rubber hole that is supposed to make it air tight when the cap is closed, but I'm not really sure. I tried switching straws (they provide two) and that didn't help.Also, I'm not sure if it's clear from the picture but it is hard to clean in the crevice that the mouthpiece sits in. I didn't try putting it in the dishwasher, but I tried rinsing it out many times and can't seem to get it clean. Definitely going to buy a different brand in the future.

Just what I wanted. Very happy so far - no leaks, no noises.

Wish I had one earlier...