I'll throw in my .02. I'm a bigger male, but you could easily scale down what I'm going to do. I'm going to take a plastic cup from a sporting event (like basketball, for example) and cut it in half. Then I'm going to build two "tops" out of cardstock, and fiberglass/resin those. I'll put hinges on one side of each half-cup, and some sort of fastener on the other, probably velcro or something. Then I'm going to put on my greebs, etc, and paint. Voila. Hope that helps!