The Persimmon Jar is a piece of decor from decors shop of Cookie Run Kingdom. This decor was added in February 2021 as part of the Lunar New Year event. This piece of decor was required for one of the lucky pouch rewards to use in the Kumiho Cookie's Pouch Mania event.
See also: All Buildings
You can the Persimmon Jar in the following tab of the decors shop:
From there it's on the bottom row towards the right side.
The Persimmon Jar costs 1,920 coins and gives 30 decor points.