Made of durable, machine-washable, BPA-free acrylic, The Beach glass patented ball and stem design holds the glass upright in the sand, grass and snow. The glass makes for a wonderful conversation piece and can add a touch of elegance and innovation to that special event in the beach, outdoor concert, while camping or on the slopes. And they float! The Beach Glass floating wine glass was created as a reusable drinkware alternative to enhance the shared outdoor experience and forever replace those unsightly, disposable plastic and styrofoam cups that litter our beaches and parks.