Foam glass bowl made of colorless glass with irregularly traversed white glass threads and white powder between the layers.Base with dislocated demolition.Shell is in the healing state.Crystal factory Spiegelau/Lower Bavaria, which produced these vases for Loetz, foam glass, shape 18/25.ca.1925-30.Height: approx. 7.5 cm, diameter;approx. 28.5 cm.Lit: sample sheet of the glassworks