Hydrapak Unisex's Watergate Waterbottle Splash Guard

Fits perfectly in a wide mouth Nalgene bottle - as advertised & easy to use & clean. I would recommend it if you are looking for a splash guard

I bought this to replace my humangear capcap which worked great but would feel of a nasty mildew smell no matter how much I cleaned it. I use this with the original Nalgene lid and so far so good! For my 40oz Nalgene and Takeya tritan bottles it fits nice and snug. Have not had an issue with it falling into the bottle or falling out during normal use. A lip around the top would completely negate the possibility of it falling in but for Mr it is not necessary. It also works great on pasta jars if you want to recycle them as drink containers lol. No mold so far but I also don't make lip contact and just waterfall everything. I do see the raised lettering as a potential mold playground as mentioned in other reviews if you use it with non-water drinks and don't clean it regularly. The vent holes work great for smooth pouring. No tears or breakage yet, and it seems durable enough where it won't be an issue. I imagine it wouldn't stand up very well as a pet chew toy though. I originally considers buying Nalgene's splash guard but wanted something pliable and not plastic. I do not regret going with this one!

Funktioniert auch in Nalgene Weithalsflaschen.

The cap fits my Hydro flask light weight series bottle with standard mouth very well. I’ve used it for few trips and it worked perfectly. As it’s soft silicon, it can push down if more pressure is applied, otherwise it stays at the top and works well.

After using these a few times over the last 6 months, I can't get rid of the awful taste. Tried soaking in vinegar, rinsing with all kinds of soap, cold, hot water. Water taste awful from these. Nice design but another piece of junk for the pile of useless crap.