Options are near limitless in the world of water bottle cages. Not only in shape, but materials, too. You have options ranging from alloy to steel, titanium, or even carbon fiber. However, few, if any, offer the aesthetic quality of the Portland Design Works Bird Cage. This water bottle cage is constructed from a lightweight 5052 alloy in the shape of a bird. Impressively, the wings of the bird are actually designed to securely hold your bottle. For installation, Portland Design Works includes two stainless steel bolts. The Portland Design Works Bird Cage is available in one size and in Black, Silver, and Chrome finishes.