I'm finding that plastic soda/water bottles are not all threaded the same - for example, a one liter Aquafina bottle did not work with the Sawyer. What other 1 liter soda / water bottles DO work, so I don't have to go buy a bunch of other drinks looking for a suitable bottle?
My own personal experience (mostly haphazardly) with bottle tops is water bottle lids rarely fit on soda bottle and vice versa. But within a soda size the bottle tops are completely interchangeable, from brand to brand. So I think they might have some industry standard.
Love people and use things; never the reverse.
Mt. Katahdin would be a lot quicker to climb if its darn access trail didn't start all the way down in Georgia.