vacuum forming Styrofoam or Something that is like acrylic but cheaper

[cubbiesfan50]

I'm looking to create a new product that would be made out of styrofoam or like acrylic but cheaper, hold water, and hopefully would use a vacuum molding machine. I have a few questions about this: How expensive would it be to make a vacuum molding machine? Can I vacuum mold styrofoam? How can I make a 3-d figure with a vacuum mold? How expensive is styrofoam to buy in semi-thick sheets or the pellets? How can i get it so that the water is non-toxic? (I was thinking some kind of thin coating of wax, but I have no clue what kind) Any information that you could give to me about working with styrofoam would be greatly appreciated.

[diyengineer]

Best thing would be to use a product which is non toxic in nature. You have to think what happens to the product once discarded in a landfill, lake, ocean. Vegetable plastics are pretty big deal right now!