I have recently started using SilikoMart Cylinder SF098 moulds for making 12 pc EP plugs at once. They are 90ml each and very good quality to make orgonite in. I prefer Silicone moulds in general for orgonite making.
Highly recommended to put in signpoles and such with a litter picking device.
http://www.ebay.com/itm/Cylind.....SwiCRUdagw
/Tomas