Onion places much attentions on the construction details and interior designs. The bell-shape granite lamps are the main features at Sala Restaurant. They are custom-made by a local factory. The structural pattern of the hangers is based on the grid system, but the design looks dynamic because of the precise positions of the weights that change the pattern of electric cables, from a straight to a zig-zag pattern. The image of a tiger leaping forwards, meaning strength in Thai’s belief, is engraved upon the head of the wooden bed. The section of a Thai ornament called luk-mahuad is redesigned as parts of bathroom counters and beds. Sala Ayutthaya projects a character of the architects who are interested in form and customisation.