May 21, 2026 Doyoung Lim www.koreatimes.co.kr Seoul expanded its discount program for customers bringing their own cups to cafes starting from Monday, as it applies to more stores to promote using reusable cups and eco-friendly habits. According to the Seoul Metropolitan Government, customers using their own cups at participating cafes can save at least 500 won per drink, with stores discounting a minimum of 100 won and the city affording 400 won. Starting this year, Seoul ha