Pewter Christening Tankard Celtic Knot. This is a classic, straight sided Pewter Child Tankard with a Georgian Handle. The Tankard has an embossed broad Celtic Knot around the body of the Tankard. The Christening Tankard is highly polished and finished to a very high standard of British workmanship. The Christening Child Cups and Tankards vary from 80mm to 90mm tall and hold an average of 170 ml. The Tankard with the Celtic Knot is presented in a blue and pink spotty gift box, is a lovely gift for any child and can be engraved.