There are some forms in chataku, such as round shaped chataku only for placing chahai (drinking cup for tea), and oval or rectangular shaped for placing chahai and monkohai (drinking cup for tea especially for enjoying tea scent before drinking).
形式には、茶杯だけをのせる円形の物、茶杯と聞香杯をのせられる長方形・楕円形の物がある。