NalgeneOn 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.

I’ve had my 48 oz Nalgene for about 4 years now and the top finally gave out on me a while ago. This style of bottle comes with the wide-mouth drinker that I’ve always had issues with. As a frequent “passenger princess” I ended up wearing my water often when we were on long drives en-route to our hikes and had previously purchased one of the little rubbery inserts to prevent splashing when I first got the bottle because there weren’t really alternative tops available. The inserts have been annoying and I don’t consistently use them so when the top broke I came back to look for an alternative again and was so excited to find this! It is sturdy and doesn’t leak at all which really shocked me. I will see the open/closure function relies entirely on that metal “pin” and I’m worried for when it inevitably breaks but for now I’m really happy with this alternative to the original tops! I ended up buying another one for our other Nalgene too

Nalgene On The Fly BPA-Free Water Bottle Cap - works great!Nalgene has always made quality products, and this cap is great.

This is the second Nalgene replacement cap (same style) I have purchased: I liked the first one enough to buy it again. It is indeed leak proof: has never failed as long as it is fully closed, using the flip-up metal closer. Two things you should consider: 1) the small rectangular plastic latch, on the flip-top, cracked in the middle on my old replacement cap, after much daily use. Still works, but needs the flip-up metal closer to make it secure; 2) mold eventually appeared on the soft rubber seal inside the flip-top, right around where it contacts the drinking spout. I am diligent about cleaning the cap, and it won't scrub off. Another family member had the same experience with this cap style. But since it functions so well, I feel it's worth it. I have taken this hiking; threaded the flip-top through my backpack loop, locked it down with the metal closer, and it stayed put. Will buy again.

Months ago a dug out an old Nalgene bottle and started using it to try and stay hydrated at work. I quickly got annoyed with drinking out of the wide mouth with the threads on it.It sat for another few months. The other day I cleaned it out and ordered this top. It's exactly what I needed. Good locking lid, easy to chug water from, fits great, and provides a carry handle.I wasn't expecting it, but the flip top even stays out of the way when you tilt back to drink from it. I expected it to hit me in the face.Great product!

This fits all my Nalgene bottles. Love it. I have used it with my Camelback bottle and if I don't tighten it extra, it will leak

Good caps. I just wish that new cars had cup holders designed for Nalgene bottles…

Works great. I like the clip no leaks

J'adore ce bouchon, il est plus sécuritaire que leur ancien modèle grâce au petit loquet. J'ai pu donner une deuxième vie à mon ancienne bouteille!

Great cap for drinking.Like all Nalgene products, these work, and last forever!

It's easy to clean and downsizes the spout to a usable size. Only issue is you need to press the lid a bit hard to get it to latch

Me encanta pues ya no tenía tapa mi botella

Der Deckel ist sehr gut zu nutzen und hält dicht mit dem kleinen Bügel.Ich nutze die Flaschen schon mehr als 10 Jahre und habe sie erst 1x ausgetauscht.