Summary

This a mold positive for the shape of a wine bottle slump mold tray / bowl

find related projects at http://www.makeitlabs.com/ in the wiki projects

Instructions

1) cut out of foam or 3D in plaster / platic shell

2) form a ~ .25" clay sheet over the mold master

3) add supports to keep the clay mold from tipping

4) dry, before firing to a bisque

5) apply kiln wash, or boron mold release

6) put a wine bottle into the mold and fire to ~1350F

i'll add a picture of the results soon at http://wiki.makeitlabs.com/projects/glass