I used a friend's Sawyer Squeeze for a week last year, and then went out and bought one with this years tax return. I love it. But with both of ours, the dirty water bags from Sawyer start a leak around the heat seal of the threaded part. That is bad manufacturing. Anyways, a platy is a better bag for this and works with the squeeze. I don't have any newer platys so don't know how they work. The filter itself is awesome, and you gotta love the 3 oz.