Suichu used in sado tea ceremony do not occur in a wide array of variations; however, in the sencha tea service, there are a diverse array of forms, including 'gourd shaped,' 'tube shaped,' 'square' and 'peach shaped' types.
茶道の水注は余りバラエティに富んでないのに対し、煎茶道のそれは「瓜式」「筒式」「四方式」「桃型」など形状は多種多様である。