This bottle entered the Tokiwayama Bunko Foundation collection as a set excavated from the same tomb with the jar with four lugs and petal-shaped flange and the jar with verticl stripes in green and brown glazes.
There are no comparable excavated examples of this pear-shaped grooved body works with vertical stripes in green and brown stripe decoration. However two other Sancai works is thought to be works from the Northern Qi dynasty based on comparison with datable excavated materiasl.
Given its shared features with two other Tokiwayama collection works, very white body clay with tyny brown particles veneath the transparent glaze that might have been caused by body clay impurities, this might be dated to the Northern Qi dynasty.

Publications
*The Bulletin of the Chinese Ceramic Study Association of Tokiwayama Bunko Foundation vol.3 Northern Qi Ceramics, Tokiwayama Bunko Foundation, 2011 (see commentary by Sarah Sato)
*Fascinating Chinese Ceramics: The Machida City Museum and Tokiwayama Bunko Foundation Collections, Machida City Museum, 2016 (see commentary by Sarah Sato)