Glass Circle is a device aimed at providing an experience that allows more people to appreciate the "voice" of recycled glass in a sustainable cycle. Glass Circle incorporates four different glass sound-producing devices, using glass as an experimental material to explore the feasibility of generating sound through the interaction of glass. These devices include Glass Whistle, Glass Xylophone, Glass Bead Tray, and Glass See-Saw. By leveraging the resonance and unique properties of glass, viewers can create clear and translucent "Glass Sounds" through touch and friction.Through the recycling and regeneration mechanism of glass, Glass Circle allows the life of glass to be extended and rejuvenated—letting glass speak for itself and communicate the enduring value of sustainability!