Do you wanna build a snowman?
One of the cool things about knowing a guy with an injection molder is that you can talk him into making things for you. When a molder needs to change materials, the old stuff in the barrel gets purged out into a pancake, unless you can talk somebody into pouring it into something else.
I've always likes the way polycarbonate looks when it's gone through this process. The bubbles remind me of ice. The leftovers end up looking like white Easter grass, so it doubles as packing material, too.