Description:
The materials used were not the standard stuff. Rather he used what he had at home.
The mold was made from something used to fill holes in walls (if I remember correctly).
Into that he poured hot glue, but made sure the the hot glue gun had heated up very well so the glue was as liquid as possible in order to fill in all the small structures. The original knob used to make the mold was similar, but didn't have the widened bottom part.