The tea canister is made of plastic. It's a rare octagonal shape, so I think it's less likely to get damp. How about it for those who live by the sea? It's a used item, and although it's not very noticeable, please be aware that there are signs of use and fine scratches on the entire front side. The inside is in a clean condition. It has an elegant chrysanthemum flower pattern. I was asked by a friend to sell it. #WinterSale #Christmas The teacups come with a box and are almost unused, having been stored for a long time. The outer diameter is about 6 cm and the height is about 7 cm, so they are small, and could also be used as sake cups or Japanese-style dessert cups. I will clean them at home and ship them.