McDonald's has put a heavy emphasis on all aspects of its beverage program in an effort to increase customer visits. The world's largest burger chain revealed last month that the U.S. business has lost 500 million customer purchases since 2012, when it first moved away from the Dollar Menu. It has already announced plans to revamp its McCafe program, to better compete with rivals like Starbucks and win crucial loyal customers that will visit frequently for a cup of joe.