The mold was printed on a Makerbot Replicator 1 Dual. .25mm Layer height 2 shells 10% infill in PLA.
I use Oogoo for casting The Rubber Ducky and you can find the recipient here:
http://www.instructables.com/id/How-To-Make-Your-Own-Sugru-Substitute/ Oogoo sets in less than 10 minutes so printing molds is a great way to build an army fast :). Add a few drops of essential oil to the mix and after a few days your object will smell like that instead of vinegar. Have fun.