this is the cheapest way to get vacuum forming. ive made 2 of them. one small one, and then one a little bigger. you can make it out of stuff you find around your house and it works great! dont do the part about wrapping the whole thing in saran wrap. its unneccesary. just put electrical or duct tape over all of the seams. oh, and use a low temp glue gun. you can make it as big as you want, jus thave to have a powerful enough vacuum cleaner rofl.