I ran by my local Walmart at 3am to pick up a heatgun (as people do), and I'd already cast some forms...and just moments ago I finished my first (successful) heat shrink of a 2liter bottle down to a specific size.

I've got two things planned for things made with this particular form...which I'll go into at a later date :P Oh, and a little side note, it's not as pretty up close as it looks in this picture. It's got some small wrinkles...but it's close enough for this sort of thing.