Don't have a dedicated bead annealer? No problem - cool your beads the easy way and batch anneal them later! Simply fill a vessel with Annealing Bubbles and plunge beads in to cool slowly, minimizing internal stresses. The unique silica composition and hollow spherical form provide ideal properties for cooling beads, allowing hot beads to be easily slid into a vessel filled with smooth lightweight bubbles that provide superior thermal insulation. Annealing Bubbles won't stick to glass or mar the surface of warm glass. Use at room temperature or place vessel on warming plate. 15 oz.