I had never heard this 'law' before, but it makes total sense. In college, alcohol was effectively prohibited in the dorms. Off-campus parties were often broke

I had never heard this 'law' before, but it makes total sense. In college, alcohol was effectively prohibited in the dorms. Off-campus parties were often broken up by 10 or 11pm. So prepartying became extremely important in order to attain the requisite buzz, particularly when you factor in weak party beer and long lines at the keg. Of course, you had to secretly store potent enough alcohol, (potent enough to easily hide in quantity) and consume it quickly, to limit the likelihood of being found drinking in the dorms. So, everyone bought 20oz soda bottles from the vending machines, knew their personal taste/tolerance in terms of how much soda to consume from the bottle, before filling it back up with their choice of rum or vodka, to be consumed quickly before departing for the evening.