i use the same type of bottle to carry rice and biscuit
mix..among other things..on canoe trips...they were
sterile water bottles from an hospital ER..a RN buddy
saved and passed them on to me..if they were good for
holding water that was used to wash out wounds they were
good enought for me..i never used them for any long term
storage but i assume the plastic was sort of inert..
a guy whos go's canoeing with me spent some time around
the campfire on the subject of Nalgene jars and the plastic
they were made from..he switched from one to another and
back again as different studys came out on the plastics they
were made from and gave up on trying to find the perfect
one and switched to aluminum Sigg bottles..