According to press reports, it's world wide this problem. In the UK I believe we now have or will soon, drink bottles that have the bottle top on and has a hole in the middle so you can put a straw through! Depends what drinks you like though I guess.

Don't let it worry you and spoil you're fun. Keep drinks near you and dont let anyone buy a drink for you unless you are with them at the bar and know all is ok.

Enjoy your time there