Polycarbonate is a clear, durable, shatter-proof material that is known for its impact
resistance. Not only is polycarbonate drinkware stronger than acrylic, but it is also
recyclable. The rock glass is a perfect way to serve cold beverages of all sorts. It is
especially useful for serving alcoholic beverages "on the rocks". The rock glass has a heavy
base to resist tipping over and is stackable to save space.