Luckin Coffee is huge in China. Now it's entering the U.S. with a model that Starbucks is sunsetting: perfunctory, mobile-first efficiency.

Luckin Coffee ( LKNCY) entered the coffee market in 2017 when it opened its first store in Beijing, 46 years after Starbucks ...

The permanent Starbucks menu has all the seasons covered. All the same, the company also likes to tease its customers and curious onlookers with thirst quenchers that arrive as limited time offers.