What Is In Your Students' Water Bottles?

Recently I wrote about students using their water bottles to cheat on exams.  I had a very successful professional email me that:

"I thought I would confess to you privately that in high school, I had a drinking problem and as we weren’t allowed to carry drinks into class, I drank vodka (1/4 vodka, 3/4 water) all day.  It’s never a bad idea to check the water bottles!"

Some universities have a policy that food and drinks are not allowed in the classrooms.  This is a good reason to follow that policy.