Costa Coffee barista urges customers to follow 'unwritten rule' in cafes "Today, we have over 7,000 stores. There will be many more thousands of stores in China in our future," Niccol said.

Luckin Coffee (OTCPK:LKNCY), Starbucks (NASDAQ:SBUX), Restaurant Brands' (QSR) Tims China (QSR), Shanghai-based Manner, and Coca-Cola's (KO) Costa Coffee are some of the biggest coffee chains in ...