Ha...I do that with juice. If I catch my boyfriend doing it I yell at him, but if he's not around...chug chug chug
milk comes in bags in canada so it's hard to do. I did it once spilled half the bag and let my dog clean it up. I prefer using a cup.
maybe the milk in canada isn't wrought with hormones, parasites, and torture, like it is in the USA. it's no wonder why everyone's sick all the time, here.
i hardly ever use cups to drink out of.. if i just need a quick drink of something i just open it up and drink it out of the carton/jug/ whatever