Heat shrink tubing might be your friend here ... into and a more-or-less stock hot glue gun, which fills the mold with melted plastic. [Print Practical] thought it just might be possible to ...

It has swapped plastic hang tabs for recyclable paper pulp alternatives, and replaced plastic shrink-wrap with wood fiber ...

Other kinds of plastic containers bend or shrink when they get too hot ... The plastic food container you used was made by heating and stretching plastic into a mold. Once cooled, it kept that ...