Dunno if this helps, but along the Oregon Coast they have local artists make glass floats as art objects and leave them on the beaches for people to find during the tourist season. (The floats are modeled after ones fishermen used to use to float their nets with, which would occasionally get loose from the nets and wash up on shore. The ones the artists do are generally far more colorful than the ones the fishermen used--actually, I dunno, they may still be using them, though I doubt it.)