The Ella-Mobbs Trophy (formerly the Cook Cup from 1997–2021) is a rugby union trophy contested between Australia and England. The Cook Cup was established in 1997 when the Wallabies and England contracted to play each other bi-annually for a decade, playing matches on a home and away basis. Since the first two years the format has only been adhered to once (in 2004, even though respectively in 2010 and 2016 there was a Test Series in Australia and an Autumn International in England), World Cup matches are not counted. The cup was named after Captain James Cook, representing a strong English–Australian connection. The cup, which was designed by Royal Doulton in London, is made from crystal.