Tsuiki (hammered) copperware, one of Tsubame City’s traditional metalworking products, is made by hammering a single copper plate with a hammer and raising the edges. At the Tsubame Industrial Materials Museum, you can learn about the copperware production process, and also try creating hammered patterns, one of the steps of making tsuiki copperware.Make your own original beer cup or sake cup by hammering the surface with a hammer to create a hammered pattern. The hammered pattern makes the inside of the beer cup uneven, which leads to better foam and creamy beer! A full range of other hands-on activities are also available.