There is really a variety of sake vessels to savor sake. The materials range widely from ceramics, pottery, lacquerware, metals including copper and tin, glass, acryl, wood and bamboo. Especially when it comes to sake cups from which we drink sake directly, the taste and flavor of sake changes depending on the materials of cups.
The pottery made of clay has a high heat retention. Especially, the ones which do not use glaze, such as Bizen Ware, have uneven surface that is considered to create richness and softness of sake, and this works especially for kan sake. The pottery made of ground rocks like Arita Ware is recommended to be used for cold sake because it can be made thin to create a smooth taste.
Glass gives a smooth taste to convey the flavor and aroma directly. A thin glass with a bowl part just like a wine glass will create a delicate flavor.
Also, the tin’s photocatalytic effect is considered to smooth the taste by decomposing the substances that might create zatsumi. Due to its high ion effect, tin has another good point that it is antibacterial, keeps freshness for longer time and is resistant to oxidation and rust.