When I was a poor highschool student I prefered the garbage can trick. Find an empty or nearly empty soda cup on top of or if nesscesary inside of the garbage bin and refill it with soda. This also works at the movie theatre with Supersize Soda's and Popcorn which are refillable. Bear in mind it is wise to check the soda cup for foreign objects before asking for the refill, or else you may fumble for a response when asked why there is a dirty bandaid and used up chewing gum in the cup.
