The Maklaud forum bowl is made from Faience.
Faience is a glazed non-clay ceramic material. It is composed mainly of crushed quartz or sand, with small amounts of lime and either natron or plant ash. This body is coated with a soda-lime-silica glaze that is generally a bright blue-green colour due the presence of copper.
The bowl holds around 14 - 18g of Tobacco depending on your pack.