From 9news.com:
DENVER — Starbucks announced Monday a new test pilot is launching in Colorado.
The pilot allows Colorado customers the opportunity to use their personal cup in the Starbucks drive-thru or café.
Starbucks said the pilot will run at 184 participating stores throughout Colorado from through June 30.
Customers can order their beverage as they would normally and let the barista know they brought their own cup. As always, for every personal cup, customers save 10 cents and Starbucks Rewards members receive an additional 25 bonus stars.
Read the full article, here.