A Fine Dual-Wall GlassThe Sio Dual-Wall Glass is the perfect companion for the Sio Cold Infusion Pitcher. Aesthetically, the transparent dual layer creates a unique visual appearance as the liquid appears to float inside the glass. Each glass is hand-crafted by our artisan glassblowers using fine quality borosilicate glass. The simple and elegant design of the Sio Dual-Wall Glass blends to any modern tabletop environment, making them the perfect glass for every occasion.