Small one works for a wide variety of bottles. Not sure what to do with the large one?
The small one fits tightly into the typical 28mm bottle used for external water filters like Sawyer and Hydroblu, which includes random soda bottles found tossed in the desert. I have yet to find what the big one fits. Presumably something 32mm? (This does leave me feeling they might as well have been both small so I'd have a second if I lost the first.) It is a tight fit and a little work to get on, but that makes sure it doesn't pop off in use. The flow is small and usable so the water doesn't run out too soon. The O-rings are attached so they aren't going anywhere and will be keeping that fit snug. There is an arrow to make sure things are pointed the right way and the spray is well directed and easily washes up liquid. I can't make it particularly strong, so a little scrubbing is in order for more. There often would be no matter what. I did hope to use these with a little 500mL soft TPU bag. I've managed to acquire three of these from different manufacturers. Turns out, they are not of any standard size. They are all too small for the large one. They are too big, too small, or at first apparently just right for the small one, but when tried with moderate pressure, it popped out. That's a problem with the bags and not these, which do fit a standard. The little one, anyway. Weight for these: small is 4.9g, large is 5.3g. Read more
