The box can be used to store your most precious small items as jewellery, keys or a watch – the box is not food approved.Hammered sterling silver, Crystal glass We recommend rinsing in lukewarm water and wash by hand in mild soapy water. Afterwards, wipe with a dry soft cotton cloth. 925S: 92,5% pure silver and 7,5 % other metals usually copper The crystal glass is of high Portuguese quality. Measurements: H: 33 mm / 1.3 inches. Ø: 100 mm.