Roll Up The Rim To Lose?

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Speaking about Tim Hortons, the Roll up the Rim is back! Everyone's favourite time of year!!!! I actually had many chances to roll up this year since I'm not a coffee drinker (not yet, college isn't until fall...plus it doesn't seem like a need caffeine to keep me awake) but from what I've heard so far, most people are not have much luck with their cups! Any else have any win/lose stories or ratios?

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1) http://blogs.ubc.ca/sydneyarcher/2011/02/21/tim-hortons-roll-up-the-rim-is-back/