Review on 🚰 BPA-Free Water Bottle Replacement Cap for Nalgene On The Fly by Brian Malith

Really like this top and can't find any others so I'll stick with it. I like how it pops open so I can open it with one hand. Doesn't leak at all even when inverted (when fully closed). This top lasted me 2 years until the little tongue broke (see photo) and even after that with the silver hook in place it doesn't leak. The most important thing is the mold stain that never goes away. I don't think it changes the water quality in any way, but it's a mental thing. Why drink from something that looks dirty (even if it's not)? There is no way to remove this stain once it has cured. So unless Nalgene develops a new type of stainless silicone, we'll stick with it.