Klean KanteenSports

I've had all 3 versions. This is hands down the best. In fact it is the best cap by any water bottle company. The original was pretty noisy. 2.0 mostly fixed that. But 3.0 has better flow and is mostly silent. Freaking perfect.

This new cap works perfectly. It’s easy to use, very lightweight and looks great. It’s a super good value for the money. It’s very versatile as he can use it on several of his bottles and it does not leak like the old cap did. It’s great. We’d buy it again.

Purchased to replace an unvented top from a knock off brand. Fits perfectly and works great. Turned upside down with full bottle, no leaks. Rubber spout is soft, opening and closing does “feel” incomplete at times, but that may be due to the soft rubber design to provide a better seal? (Less leaks). I have not noticed any strange sound from the vent. Good product at a decent price, worth it if you need it.

The lid works as it should but the sound it makes is super annoying (as other reviews noted).

I bought a couple of these for Klean Kanteens that I had for a while. Better when driving -- you don't need an extra hand. Turns out they also fit Yopay water bottles. What is interesting is that the four I bought most recently came with a cap that fits over the nipple. Two advantages: keeps the tip clean. May make it a little less likely to drip. Can be removed if you don't like it. It is a little harder to drink from the bottle with the cap but I got used to it pretty quickly.

Great product that works well all the time.

I had been using the original spout that came with my Kleen Kanteen for about 10 years. The original spout would close while drinking. There was no longer an interference fit. This made it necessary to use two hands while drinking. One hand was used to hold the Kanteen and the other hand was used to keep the end of the spout open. The replacement spout did not have this problem. The new spout also seemed to flow better than the old one regardless of the issue previously described. Before I purchased this new spout, I tried a one-hand design that used a button to open the spout. That mechanism failed in less than 30 days of use. I didn't realize they sold replacement spouts for my old Kanteen until I looked for it. This replacement spout cost nearly half of what I originally paid for the entire Kanteen. But, that is the fiat currency we have.

We have younger children who have as yet not outgrown their must-gnaw-on-all-soft-things eras. They continue to chew off the closeable rubber spout on these water bottle lids over time. It's not a matter of quality; we just seem to have a herd of rodent children where these are concerned. We're glad that the lid is available separately. Just wish it was a little less expensive! We're about $50 in just in lids for these water bottles, haha.