Nalgene On The Fly BPA-Free Water Bottle Replacement Cap

I partially freeze my water bottles for the day over night, and every so often I accidentally leave one in there. When that happens, occasionally the bottle itself will crack, but more often than not, the threads on the lid just get shredded up and the cap bursts off, so I end up replacing a lid a month or so. when I saw that these were something like $1.50 more, I decided to give them a shot. Here's a few quick pieces of info for future buyers.Pros:-The spout is great. I always get the large mouth nalgenes because it's easier to throw lemon slices in there if I want, and it's much easier for cleaning, but the big mouth can be awkward. This is a pretty good compromise. The spout is about the size of a glass soda bottle (probably a little thinner) and very comfortable to drink out of, but removes for cleaning.-These seem way sturdier than I expected. Nalgene always makes nearly indestructible products, so I don't know why I was surprised, but something about the design seems . . .tenuous. I can assure you, it's not. This is a very substantial product. We'll see how it survives a fall if I mishandle it rock climbing, but for day to day use, I have no doubt that this would survive a fall from head height.-The lid closes with both a plastic catch/push button on the front, and a wire swing gate. This thing is not coming open by accident. My guess is that it would break before it opened in a drop.-I've hung it by a carabiner and attached it to my bike already and it doesn't seem any worse for wear. The loop is definitely handle worthy.-The closing mechanism is a little stiff to provide a solid seal, but I have absolute confidence that there won't be any leaks or drips.Cons:-This obviously adds to the height of the nalgene. It's not much, but it just so happens to be just enough to make it catch on the zipper on my messenger bag, so I'm sure I'm noticing it way more than anyone else would.-The only part on the lid I'm even slightly worried about is the push button mechanism. It seems very sturdy, but getting opened dozens of times a day every day might be rough. I will update if it ever snaps. If I haven't updated, you can assume the latch is still holding firm.Any other complaints I have are cosmetic, so I can't really hold them against the product. It would be cool if there were more colors (the bottle I needed this for was orange). I like the classic nalgene look, these look a little over-designed for my tastes.All and all, when I wind up screwing up a new lid, I'm not sure which way I'll go. It'll probably depend on how this top is holding up. I definitely won't be upgrading unless the current tops on my nalgenes get damaged. A nalgene on amazon is something like $12, parting with $7 for a lid upgrade seems a little silly to me, but if I'm replacing the lid anyways, it's probably a toss up between the classic ones and these. If you need to replace your lid anyways, check them out.

These work really well for making your Nalgene bottle a little more user friendly. They work great on the 32 or 48 ounce versions. A little more handy on the 32 than 48 though (repeatedly lifting a foot long 3 pound bottle to your face is not the quickest or easiest thing)This is a very handy top. It is also pretty sturdy. There have been at least 2 occasions I have dropped it on a side walk while attached to a full 32 ounce Nalgene. It got a little scuffed but still functions like new. Make sure you use the metal band to lock the lid shut. I forgot to do it a couple times and once the bottle opened in my bag and got everything wet. Luckily there were no electronics so nothing got ruined but it definitely was an eye opener. I am much more careful now.Hydro Flask:I had originally bought this for my 32 ounce insulated Hydro Flask. It's the same shape and size(roughly, very similar. Hydro Flask is a little taller and maybe a tiny smidgen less in diameter than the Nalgene). However these DO NOT WORK on the Hydro Flask. Water leaks around the threads. When screwing the cap onto the Hydro Flask it feels just fine like it's meant for it, it doesn't bind up or feel too loose. Because of this I'm thinking you might be able to get away with using some teflon tape around the threads to seal it better. There's a space on the underside of the cap that looks like it would be perfect for an o-ring. If you could get one just the right size it might also stop the water leakage problem.

I bought one of these over three years ago for the 1-liter bottle I use for work. It saw literally tens of thousands of open & close use before the little wire "double-lock" half hoop broke its mount in the base of the cap. (Serious design flaw; probably intentional - built-in obsolescence.) It still worked, but I could no longer be certain that: 1) it would stay fully closed, and 2) it would keep carbonated drinks from going prematurely flat. So, I came back here to buy a new one.I didn't care what color it was, just wanted the cheapest. (You need to click on each color. For whatever reason, they sometimes have one or more colors selling for cheaper than the others. The gray cap I got was half the price of the other color choices when I bought mine. Weird, but true. ) These flip-top caps work great and my old one certainly held up admirably to a LOT of daily use and wear & tear. Very satisfied.EDIT: This replacement cap failed in the same spot after less than 3 months! Not bothering with this style anymore. Going to try something different (and hopefully, better) :-(

I love these lids. I've been using them for years. They fit all standard wide mouth nalgene type bottles and seal really well. The safety bail keeps it from opening accidentally, and I've never had an accidental spill.My only reason to not give these 5 stars is the silicone seal. They quickly develop a black mildew-looking stain, but it doesn't come off no matter how much you scrub it. Even bleach doesn't remove it. So I doubt it's actually mildew and it doesn't impart any off flavors. It's just unsightly. The silicone button DOES come out easily, so could be replaced, however Nalgene doesn't offer this part for separate purchase. PLEASE ENALGENE! Sell these as a part!

I absolutely hate using the large mouth lids and this one fixes that! Nice tight seal that can also be secured shut. It's held up for a long time. I'm on my second as the first started getting some mold on the inside rubber.

This is the cap you want so water does not splash into your face . Works great on the Nalgene bottles