>>2194429-yes
-1L for day hike, 2L for overnight
-Sometimes in drier seasons I'll bring 3L for an overnight so I'll have enough to cook and keep me hydrated if I don't find water till the next day
-depends
Just ordered this collapsible bottle to try out. Looks like it would suck to drink out of, but it fits sawyer squeeze threads, should filter faster than a smartwater bottle, and be easier to fill than sawyer bags. I might put one of those sport caps on it to see if I can use it to suck up water like an accordion if the only sources are super shallow