The present-day distinction of thick and thin tea was not clear until around the Azuchi-Momoyama period, and wooden tea caddies were initially also used for making thick tea (It is considered that thin tea was originally prepared to empty the residual in a chaki.)
安土桃山時代頃までは現在の濃茶と薄茶という区別は明確ではなく、こうした木製の茶器も当初は濃茶を点てるために使われていた（茶器に残った茶を飲むために薄茶が発生したと考えられている）。