The cup is constructed of the highest quality plastic which gives it a clear diamond finish simulating polished glass. New Covenant Communion Cups are made from the highest quality plastic. Our communion cups are durable so they won't crack, stick, or leak. Our communion cups are 100% recyclable. The cup's standard 1-1/4-inch size allows it to be used with any standard communion ware. The 3/4-inch width design gives the cup a larger base than most cups. Therefore, the cup sits higher in the communion tray allowing for easier pickup.