Just finished my fourth lamp and I got a bit adventurous! I used a wavey whiskey bottle and did the Lava in a Metallic Silver.
I had asked Dr.What how he goes about making "Metallic" Goo and he suggested using a metallic Sharpie directly into the hot wax, it worked great!
Here is a video, let me know what you guy's think :)
The bottle looks deceiving in the video it's about 15" high and about 3" square.
It's a pain because the bottom of the bottle is very thick and it is hard to keep a steady temperature going. I used a 50 watt mini spot on it and although the flow was a bit fast I could live with it.
I need to build a base that will allow me to have the bulb an optimal distance from the lamp.