I make environmentally themed pieces out of many types of glass. Much of it is salvaged building glass and bottle glass. The jellyfish type creatures were slumped into Slumpy's pedestal casting ring which I lined with fiber blanket. The smaller creatures were slumped into Slumpy's soccer pod mold which I again lines with fiber blanket. The coral and shells were shaped on the stainless steel wave slumper and steel slump humps.