Mori soba and zaru soba are made by rinsing boiled buckwheat noodles in cold water to bring out the chewy texture that will be served in seiro (steamer), a rectangular wooden or bamboo tray lined with a bamboo mat or basket.
茹でたそばを水で締め、木製か竹製の四角形の器の底にすのこを敷いた蒸篭（せいろ）や笊（ざる）に盛り付けたもの。