Mold For Beer Bottle

This are two two-part mold designs I made for a project of a friend who made a cast in candle wax. We used vaseline as a release agent and to prevent leakage we duct taped the seams and submerged the entire filled mold in cold water to solidify the leaking wax so it would seal itself. Picture will be uploaded soon.

Note: wax shrinks a lot whe cooling. I should have added a resevoir for the wax to seep into the mold to keep the volume constant. I got a hole at the bottom of the bottle (which d