Lisa Bergantz of SMMARTideas.blogspot.com adapted my Skittles Density Rainbow for a TV presentation. Watch her at
She did it differently than I would do it, but I like the way she layers the water in a straw. This looks like a fail-safe way to demonstrate the rainbow without the tricky pouring. Of course, I love the way the full rainbow turns out, so I'm going to keep doing it myself.