Moldable Plastic that you melt in hot water and then shape however you want it - 35 oz.
Fancy - Plastimake Moldable Plastic
the process of making rings out of clear polyester resin, a type of moldable plastic. Everything from mold-making to embedments.
Common packaging styrofoam is actually puffed polystyrene, the same polymer that's used to make things like CD cases and plastic model parts.