Polymer plaster bowls which are cast then shattered before being restored using a technique similar to Kintsugi  (“golden joinery”), also known as Kintsukuroi. This is the Japanese art of repairing broken pottery with lacquer dusted or mixed with powdered precious metals. As a philosophy, it treats breakage and repair as part of the history of an object, rather than as something to disguise. Note: their name references their ability to reflect sound directed at their centre.