A slightly cheaper source of laserable foil is Oracal 352, such as this available from Signwarehouse.com. You get about twice as much (15" wide by 30 ft long) for about the same price as the Laserbits foil which is 6" x 25 ft. The Oracal 352 is a polyester based foil. I’ve tried it and it works great in the Glowforge.