Ronnefeldt Teahouse is a tea shop on the first floor of the exhibition hall at the south gate of COEX in Samseong-dong, Gangnam-gu, Seoul. It serves black tea, milk tea, and coffee, with a range of black teas and menu items such as milk tea, Earl Grey roll, and Struss Vital Aid. The COEX location is relatively uncrowded, and the store has several large table seats inside. The taste varies from tea to tea.