Cee-Jay
Sasquatch
I don't think this should be a concern. My 1.75 L Seagrams VO comes in plastic. Also, I have 91% rubbing alcohol that came in a plastic bottle.
Good point... rubbing alcohol is sometimes as much as 99% alcohol content and it just about always seems to be in plastic bottles, as you pointed out. So perhaps a) alcohol does not damage plastic, b) it only damages certain types of plastic, c) it damages plastic but it takes a really, really long time, or e) some other answer.