I've decided to try my hand at selling some models on Shapeways. I used a demo of Modo to model the bottle, with Zbrush for the skull, details and scaled .SLT export. I'm new to Modo, but have to say I am really liking it. I think I'll pick up a license the next time it goes on sale.
I'll post a follow-up once my test print arrives, with perhaps a quick posting on my process.