Head to Starbucks on April 22 – Earth Day Free brewed coffee or tea, hot or iced! At participating stores in the United States and Canada. How? – One of Three Easy Ways: Bring in your own travel mug or tumbler If you don’t have a tumbler or travel mug, they will be available for 20% off on Earth Day, April 22. What if you can’t bring in a mug and don’t want to buy a new one? Just request your coffee or tea in one of our “for-here” cups and Starbucks will pick up the tab.