Hydro Flask Standard Mouth Lids- Accessory for Standard Mouth Water Bottle

You can't use it without the straw and you have to use the straws it comes with or it will leak, even if it seams like the same size. But other than that it's a great replacement for the usual cap. I know it sounds simple but I love it because I'm always trying to find ways to get myself to drink more water and the flip straw rather than having to unscrew the cap makes a huge difference in my water intake.

This is exactly how they original lids were designed, then they went to plastic for almost all models.The plastic ones have a thin flat gasket and not an o-ring. It's super hard to get it to come out for cleaning. The plastic ones also are made of two parts that are snapped together in the factory. This is NOT a water-tight seal. So gunk gets inside and is a potential health problem. I drilled a hole in the plastic one and gray goo came out. The entire design of the plastic lids is faulty as cleaning is almost impossible.This, though, is all stainless steel. No seams or ways for water to get inside.It also has a standard o-ring that takes a second to remove and wash. This is also a normal industry-standard size.This is not a knock-off, but made by Hydro Flask/what came on the original model years ago and now is a replacement part. I think they sell one or two models with the stainless steel lid and everything else is plastic.This is a mandatory upgrade that will make your flask last 10-20 years without health issues.

Really good cover!!

I’ve been using this for around a month now and it works better than the reviews I saw. I’ve had no issues with the tab breaking, it fit perfectly with my 18oz hydroflask, easy to clean, and no leaks while it’s closed.

Bought this for a 5 almost 6 year old to use with a kleen kanteen narrow mouth bottle. Pros - It fits the kleen kanteen bottle, looks very easy to clean (the red silicone can be pulled in and out for cleaning), and seems less awkward to drink from than the larger wide mouth spout.Cons: There is no way that I will be able to get her to open and close the straw without touching where she is going to to put her mouth. This is not a good solution for at school :(. it’s possible to do if you are really careful and only out the very tip in your mouth or if you your pointer finger but the likelihood of that happening is slim for a child. I bought this to replace the kleen kanteen sport cap because she used her fingers to open it and I didn’t like how it was always exposed. Due to this, I will sadly return it. Hydroflask could solve this issue by having a sanitary cover, making the spout longer, or possibly making the pull tab longerAnother potential con is that is leaks more than the wide mouth straw cap when the straw is not pushed down. Another reviewer had a video of it. This wouldn’t be an issue for her at this age but it might be an issue for other families.

I am not sure why this doesn't come standard. I am sure it probably has something to do with adding revenue, but it is so much better than the cap that comes with the bottle. I like this because it makes it easy to drink one handed. I am a HS principal, and I carry my Hydroflask around on duty with me. This make is easy to get a drink without having to find a place to drop my laptop and anything else I might be carrying with me. It cleans up well. It is not 100% leakproof. It will leak if you hold it upside down or shake it. Not huge amounts, but it does leak. I made the mistake of leaving it in my backpack on a flight to Europe last winter holiday. It sat in the overhead on its side for 8 hours. It leaked all over the overhead, and was sloshing around. My family was the only one that had luggage in that bin, so the only was the only looks I got.

I swapped out the standard mouth cap on a standard mouth bottle to this lid and noticed it lined up with no cross-threading or leaks. I used the flexible handle to carry the bottle clipped to a bag during a short hike, and the seal held liquids contained even with bouncing around. Cleaning really didn't require any additional effort as a bit of water and a quick brush were sufficient for any residue inside the cap.

This was a Christmas gift for my daughter, and she uses it every day. Quality product, arrived quickly, and would buy from this seller again.