This is a great camera tripod idea. I don’t think I would buy one for $11 but for about $0.50 I could get a nut and bolt from Home Depot and screw it into an old screw cap and throw that into my camera bag. It wouldn’t have the nice swivel capability but a few napkins under the pop bottle could get the elevation that you are looking for. 

Via: The Bachelor Guy

"This convenient bottle cap tripod has a universal camera mount with an adjustable angular design. The cap mounts to any standard bottle top and can easily be dismounted and unscrewed quickly to store in your bag."