We’ve always thought the idea of additional lenses for a smartphone camera was a neat, if not a bit impractical, idea. The macro lens is a popular choice for those wishing to beef up their shooting power, but there is no easy way to mount most options found on the market. That was before someone thought up this ingenious macro lens rubber band. You get exactly what the name describes, a lens for snapping detailed close-ups within a stretchy loop of rubber. The result? A lens that will fit any smartphone and stay in place without any modifications to your handset or additional mounting hardware. And it only costs $15.