Zisha (or not) go container

[Fabien]

I saw what looks to me like a container for go pieces but it was said to be a tea caddy. Looks made of zisha to my eyes.
Does any of you can confirm my first thought?

Anyway, I think It might be interesting for storing liu bao for example. Has any of you already tried those container/jars for pu'er or other teas like heicha?
And sorry for the blurry photos

container go bis (1).jpg (20.53 KiB) Viewed 531 times

container go (1).jpg (39.65 KiB) Viewed 531 times