Anybody have a suggestion for which soft drink bootles have the same thread as a sawyer Squeeze. My last US issue Smart Water bottle recentley died and the ones over here have a different thread.

Most "standard" drinks bottles are compatible with Sawyer filters. I've used Coke, Pepsi and various still / sparkling water bottles in the past.

Assuming you get the right bottle. [Edit updated
A tip from backpackinglight.com
invert the bottle so the 'impure/mucky' water is at the bottom.
Gently squeeze the 'mucky' as the water rises it Expels all the trapped air & flushes 'Micro bubbles' out so the whole Sawyer filter is wetted,
Invert and...Enjoy a better flow rate[/i].

...and remember (for overnight) not to let it freeze t* (Keep it on you in in sub zero conditions such as a sleeping bag or jacket etc.)

after a trip, Purge with water 1x drop bleach kill bacteria storage.. and air dry in a warm place..

*After freezing damage there maybe no physical signs of damage or flow rat , but the hollofibre will be ruptured & ceasing to function at filtering out bacteria.