NalgeneOn The Fly BPA-Free Water Bottle Replacement Cap

The media could not be loaded.  Love this lid for converting the wide mouth to narrow, so you can have the bigger Nalgene and not spill. It opens and closes easily, doesn’t leak at all, and is a good place to carry the bottle from. I have dropped it straight onto the lid which scratched it but did not break it or affect the performance.

It works as designed. I don't know how tough it is over time, but it seems like it will hold up to my average usage.

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.

Great top for chugging without spilling. Helpful in the car. The lid is a little hard to press closed so be sure to use the metal wire lock to prevent spills.

Great quality! It is nice to be able to replace just the lid instead of the whole bottle.

Great addition to my Nalgene bottles.

My old water bottle's safety ring was gone and started to leak, but bottle was still good. I hate throwing things away, so this was perfect solution. I couldn't find the exact color for my bottle but close enough!

I have had to replace this product twice now, but I keep coming back to it because I believe it's worthwhile despite the issues.The first one broke. The plastic "loop" or "hook" mechanism at the front of the spout lid split in the middle, preventing it from snapping into place when closed. The cap wouldn't stay shut without locking it with the metal clasp. To avoid this, I recommend always having the metal lock in place when unscrewing and screwing the cap. This will reduce the strain on that plastic part.The second lid has formed what seems to be a moldy spot underneath the silicone seal. Tons of people mention this happening and some say they aren't sure it's actually mold. I can't be sure either, but I'm not taking any chances with a daily use water bottle, so I purchased a third cap.Why would I purchase a third cap despite these issues? Because the design is perfect for people who need a minimal barrier to entry for drinking water. The hooked cap makes the bottle easy to carry (no excuse to leave it behind), the button is way quicker than unscrewing a cap, and the lock has never failed to keep the cap closed even when the bottle has been dropped. It just works.

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

The best lid to ever exist!

Da ich die Flasche mehrmals unglücklich hab fallen lassen, war der Verschluss defekt. Der Flaschenkörper war unbeschadet und es ist super, das ich nur den defekten Deckel austauschen konnte. Die Flasche ist ziemlich robust und fast unkaputtbar,...😉

Wished I had bought one sooner. Seals well, but easy to drink from.