Makey mold

This is a mold for a mold. After printing fill the print with silicon or a similar substance, I filled mine with a silicon and cornstarch mixture, then let it dry and remove the printed part. this mold works well with wax or chocolate (although if you are using normal silicon i wouldn't recommend eating the chocolate). You may have to cut vent channels into the mold, as you can see in one of the pics, to get a complete casting.

Update: I have added a STL that has the vents, so you wont have to cut them.