Fantastic Japanese cooling bubbles that are used to prolong the cooling process . There are 1 1/2 litres in the bag which is enough to fill a biscuit tin , laying the beads into the bubbles after taking from the flame as you work the "bubbles" will surround the bead and cool it much slower than vermiculite and fibre blanket , better for the bead and allowing you to produce much bigger beads without a worry of cracking before they get to the kiln.
