I've been quoted many times saying that the Platypus bags were compatible on my Sawyer filter. I had done a test in my sink and was thrilled. I went so far as to walk into the backcountry with nothing but my Sawyer and two platypus bottles, so convinced was I of the compatibility.
I was mistaken. I couldn't get the threads to align this weekend, no matter how gentle I was. I was heartbroken. I guess I had either missed the leak in my sink, or I happened to find an alignment where there usually isn't one.
Luckily, this is the 2013 squeeze, so it came with a more durable plastic bottle than the original leaky ones from previous iterations. i got it from MLD, I think they were one of the first to offer it. Also luckily, a friend brought a liter of Coca Cola into the woods, so I was able to filter almost 3 gallons of water for our group without a single hiccup. Sorry, I didn't try to filter the coca cola.
Thanks for reading!

