Worbla's TranspArt
Worbla TranspArt (or Transpa Art) is a clear, non toxic thermoplastic sheet that you can shape with a heat gun and minimal tools for fantastic effects like fire, ice, and more.
This product should be heated to 120°C (250°F), so wearing work gloves with rubberized fingers is strongly recommended. The material cools down after a few minutes but can be reactivated as often as you like, so you can work bit by bit.
Important note: TranspArt is not perfectly clear. Please note that sheets will have lines from the extrusion molding process through the length of the sheet and occasional divots. These can be heated and stretched out when shaping.