Poison Flask with removable stopper

This is a remix of Elymas's awesome poison phial gamepiece
http://www.thingiverse.com/thing:304164
I removed the base and cork, and printed it with 0% infill and no top in my Slic3r settings to produce a hollow flask.
I found a skull and crossbones medallion here
http://www.123dapp.com/123D-3D-Model/Skull-and-Crossbone-Medallion/599882
and took the skull and crossbones mesh and merged it with a cork in Openscad to produce the cork stopper. Print it and remove the supports from the cros