By Lisa Hix — June 24th, A beer is served in a glass with a pretty woman on the front. As you drink, something catches your eye—inside your glass you can see the bare butt cheeks of the same glamour girl presented fully dressed on the outside. Compared with the explicit images now accessible with the click of a mouse, these tumblers with pin-up decals seem downright quaint. Long before the Internet and cable TV, though, they offered a tantalizing thrill. In fact, they purportedly have the largest novelty collection in the world.