I believe that about 80% of the Tim Horton's coffee I buy during the roll-up-the-rim-to-win contest have already been rolled up and checked. It is easy to tell...if the spot where the writing is is looser than the rest of the rim...it's obviously been looked at. I would like to see Tim Hortons investigate how many prizes are won by employees and their families compared to the general population. read full review »