Wanting to replace my Pur Hiker filter with something lighter, I bought a Sawyer Mini. The 16oz bag it comes with is too small, but I already had a 2L Platypus bag I thought I'd use. Unfortunately I find that the Platypus bag uses a thread that is just slightly different than the Sawyer (which is the standard pop bottle thread). It will almost work, maybe will work sometimes, but leaks.
I did a search on the net and found that this is not exactly news, but I thought I'd pass it along here.
I just ordered a CNOC Vecto bag, which looks like it might work well. Kind of like the Platypus zipper top hydration bladder, but maybe more versatile. And much cheaper.
Loc: Central Illinois near Springfi...
If I remember correctly, the CNOC bag has threads that match Sawyer, as does Evernew and the ones at Walmart (Ozark Trail?). Platypus is the odd one. I haven't looked at Walmart lately, so I don't know if they still carry these. If they do, they are inexpensive.
Loc: Nacogdoches, TX, USA
It's been awhile since I researched this, but I seem to remember people got it to work somehow. Screwing it down really tight? Adding teflon tape or a gasket? Something like that. I'd try teflon if you have any laying around.
You might make it function, but it would never be right or very reliable. It seemed to work the first time I tried it, but I apparently just didn't notice the leak. The thread pitch on the Sawyer bottles (also pop bottles) is 2.7mm. I measured the thread pitch on the platypus at .15", which would be 3.8mm. It's close enough to feel like it's threading correctly, but once several threads are engaged things go wrong.
In any case, both the Sawyer and the Platypus are inconvenient to fill from a lake or stream. The CNOC bottle has a wide opening at the other end for filling. I'm anxious to get it and see if it works as advertised.
Loc: Gateway to Columbia Gorge
Please let us know how this works out!
Do note that since Cascade Designs (Platypus) and MSR are the same company, and they advertise their water filtration products as compatible, it appears that you'll have the same problem with both brands being incompatible with the rest of the world.
May your trails be crooked, winding, lonesome, dangerous, leading to the most amazing view--E. Abbey