The menu lists Thai and Lao beans from Baan Doi Ngam, Baan Mea Kam Pong and Boloven alongside a Brazil Santos, with oat and almond milk as add-ons and organic soy milk as a menu item. Wongnai describes Yelloo as the next step of Yellow Craft, a slow bar with soy milk.
The white facade sits on Nimmanahaeminda Road with three arched doors below and three arched windows above, and a covered terrace to the left. Inside, an L-shaped counter and a separate brew bar stand on a terrazzo floor, and a timber-floored room upstairs looks down the stairwell through a glass balustrade.