Chatramue Terminal 21 is a tea shop selling Thai milk tea and green tea on the B1 and 4th floors of Terminal 21 near Asok Station. Customers choose among Thai tea, green tea, and oolong tea, with sweetness set at 30, 70, or 100 percent. Drinks come in reusable cups that can be kept as souvenirs. During lunch hours, delivery orders and queues overlap, and waits can exceed 20 minutes.