Tomorrow is Earth Day and Starbucks is celebrating by offering free coffee or tea, iced or hot, when you bring in your own reusable container to put it in.  Every day that you use a reusable mug, get .10 off your coffee purchase.

Caribou Coffee is offering their Rainforest Alliance Certified coffee of the day for free when you bring in a reusable mug to put it in.  In addition, every day that you use a reusable mug, get .50 off your coffee purchase.