You can see the clear plastic soda bottle which fits over the form after the bottom was removed. A heat gun causes the plastic to shrink to the shape of the plaster model. Once formed, the ...

gear-like disks side-by-side with teeth cut from them that pull the plastic in while shredding it (in contrast to this lower-throughput experimental DIY shredder made with two steel pipes).

Every one of us creates huge amounts of plastic waste. Whether from soda bottles ... the garden is to use them as planters.