About this 3D model

Another one of those start-of-Summer rituals is getting the old porch swing back into working shape. Ok, we don't actually have a porch, but now have two swings: the old one near our pond and the new one on our deck. Anyway, what good is a swing if you can't enjoy a refreshing beverage while swinging? Here are two improved, double-cup, versions of my http://www.thingiverse.com/thing:339178 holder. Either one clamps onto the non-swinging metal sidebar of the swing using 1/4 20 bolts.