Much Better
I originally ordered the blue color-changing banger, and the color did not change at all. If I could suggest something to the company, it would be to stop selling the blue ones, because even the customer service person I talked to said the blue doesn't really change color. I think that color was just a bad choice; it doesn't work. However, they were very nice—though, it did take a while to get a real help. They sent me a new one, in yellow this time, and it works great! When heated, the yellow crystals change into a nice deep orange. And not just a "it's glowing because of the blow torch" orange. I like this one much better! Very cool.