These Solar Luminaries are made from small vintage glass Punch Cups reclaimed from my local Landfill, that I hand paint with the same high temp paint that I have been using on my hand painted projecting Light Bulbs for 20 years.
It is a water base color that is permanent and weather resistant once cured. I find these glasses at the recycle center at the dump. Many times I find a whole Punch bowl full of Punch Cups that were left over from an estate sale.