This is a small container meant to carry in your obi, kaichu or sleve of your kimono. There is a large threaded lid that allows easy filling of the container. There is a small hole with a stopper for portioning out one “dosage” of incense.
Pour a dosage of incense in your hand and rub it between your hand. Some tea people use this before entering the tea room if there is no tsukubai in which to purify hands. Other use ut for the enjoyment of incense surrounding you when doing tea