I finally got these done after a lot of mucking about and failed attempts and just a big pile of annoying crap. The biggest issue was finding the right jar - still haven't, but I don't have to be as picky as I was being originally.
These are just prototypes, more or less. Although the look of the Yeti Fetus Jar on the bottom is most likely how they will finally look - just sealed better. These bad boys tried to escape on the trip to the conference in Hamilton. I had to go out and get new jars and some candles to fix and reseal them.
I'm just working out what size will be perfect and placing an order with a supplier next week and hopefully they'll be online for sale within the next couple weeks.