In the 1960s Věra Lišková pioneered the use of flame-worked borosilicate glass to make abstract sculpture and sculptural animals. They were made by softening, inflating, and manipulating tubes of borosilicate glass (like Pyrex) with a torch. The individual parts were assembled by fusing. Though borosilicate glass is traditionally used to manufacture scientific apparatus like beakers and test tubes, Lišková uses it for imaginative sculptural manifestations of sound. This piece is a physical representation of an echo, rendered with breathtaking clarity in transparent, paper-thin glass.