Originally Posted by Jeeves
Certain passengers, feeling they need to get their money's worth, will ask for a can and they usually get one.

not to mention, certain passengers who may be thirsty.
AS changed the policy on this sometime last year...they provide just the cup of soda, and full cans only upon request. Seems fair enough to me -- most people are ok with the glass, great. If you want the whole can, just ask for it.