Shirley, "They're squares!"
This Titanium light showcases the beautiful colors that can be obtained by anodizing, but also provides protection to the anodized surface as well. It took many iterations of processing before it was possible to have some fairly square blocks, without rounding over the edges too much, and not destroying the anodizing in the process.
While not clearly evident, this light consists of two pieces that screw together in the middle, with a click switch embedded in the tail section.
The light uses RCR123 batteries.