The Sili window Square Pegs Glass Tumbler can only be described as unique! The silicone lego like silicone sleeve surrounds a 20 Oz. shatter resistant Sili Window Glass Bottle. Wide opening lid good for ice. For more fun add some fun stock sili pegs (see website) Available with a Fresco printed or etching on the lid only (additional run)! This item is also top rack dishwasher safe.