Sun Jars
The one thing I did change from their guide was in the method of frosting the glass. They have you buy a can of glass frosting (like for Christmas), and spray it on, but I just so happen to have a mother-loving sandblaster, so I unleashed a pneumatic can of awesome instead. Getting an even coat was a little tedious, but it's a very stable frosting, so the effort was worth it. Other options would be to acid etch it, or fill the jar with marbles, broken glass, etc.
I also happen to have access to theater gels, so I've been debating whether to change the colors, but I've been *very* happy with white. My family loves them, and we're almost temped to just put larger rechargeable batteries in them, because we enjoy them inside in the dinning room.