"One person can save trees. Together, we can save forests. That's why we'd like to encourage everyone to switch from paper cups to reusable travel mugs. Check out Starbucks to see the thousands of people taking the pledge to make a difference."
"Join the movement. On April 15th, bring a mug to your local Starbucks and we'll give you a free brewed coffee. Bring in a mug any day, and get 10 cents off your beverage, anytime."