As a way to promote its other goods, Japanese glass manufacturer Hario Glass has created the world's first series of glass stringed instruments. The two violins, two violas and a cello were handmade with its heat-resistant glass and will be displayed on the 21st floor of Sogo department store in Causeway Bay this weekend. Furthermore, musicians will actually play them in a series of short performances. The company says the instruments are collectively worth HK$2.3 million and the press release claims they offer 'superb tonal quality and produce sublime, crystal clear music'. Of course, it's all designed to sell some water pitchers and other glassware. But we want to know, will the instruments shatter if you play a really, really high note?