ATM Tea Bar is a shop in Siam Square, Bangkok, selling bubble tea, milk tea, matcha and fruit drinks. The menu includes Chocolate Cookie Milk, Kumamoto Dream and Love You So Matcha, and customers adjust the sweetness and toppings. The Siam Square branch is open from 10 AM to 9 PM and takes orders both by screen and from staff, with two small seats outside the store. The tea is not strong.