ToplineStarbucks will now allow customers to use personal cups in all orders, including drive-thru and mobile orders, as part of the Seattle coffee goliath’s efforts to reduce its waste output driven largely by its iconic disposable coffee cups.FILE - The Starbucks logo is seen, March 14, 2017, on a shop in downtown Pittsburgh. (AP Photo/Gene ... [+] J. Puskar, File)Copyright 2017 The Associated Press. All rights reserved. Key FactsStarting today, Starbucks will expand its reusable cup program to allow cust ...