Apparently the title is a wrong question, because you don’t get a lens mug for 15 dollars, however, you can get the underwater camera.
Similar with popular Lomo, this is a 35mm film-based camera measuring 4.75 x 3.5 x 1.5 inches. The 35mm camera comes with a 28mm wide angle fixed focus plastic lens. Although the lens can’t bring you more clear bikini, fortunately the wide angle can allow you to hold more girls in a photo. Of course, the most importance is, that the reusable camera features water resistance up to 8 meters, and it can float on water. No doubt, it’ll be a good partner in water. Apart from that, the waterproof camera ships with a pre-loaded roll of 27 exposures of 200 ASA film and an adjustable nylon wrist strap.
As it’s been said, the underwater camera is priced at $15 USD. If you like this kind of film-based camera, jump to Photojojo for more details.