different containers for different situations...
When your at oktoberfest you drink draft beer out of a glass (so i've read)
When at a busy bar where there isn't room to sit around anywhere a bottle does great.
When at a concert there is no glass aloud so you happily drink it from a plastic cup, often in more quantities than usual in my experience.
When outdoors, in the bush, camping, anywhere you have to carry shit somewhere cans will do perfectly!
Don't they teach this to you in high school? or is that just a canadian thing?
