If you want to do it cheap you can make your own molds and remelt your old or unused plastics. I started that way. Go on youtube and type in making worm molds, plaster of paris. You can remelt old plastic in a microwave but dont over do it, cause in can burn. Or you can buy a electric flat top burner from walmart, aluminum small pots and melt your plastic that way. The best is to do this in an area with plenty of ventilation and I always wear a paper painters mask for the fumes.