Sheffield Shield of New South Wales, Victoria and South Australia were already playing each other in ad-hoc matches. The new tournament commenced in the summer of 1892–93, mandating home and away fixtures between each colony each season. The three teams competed for the Sheffield Shield, named after its benefactor. A Polish immigrant, Phillip Blashki, won the competition to design the trophy, a silver shield. The competition therefore commenced some 15 years after Australia's first Test match. In 1999, the Australian Cricket Board (now Cricket Australia) announced a sponsorship deal which included renaming the Sheffield Shield to the Pura Milk Cup, then to
Sheffield Shield the Pura Cup the following season. "Pura" is a brand name of National Foods, a wholly owned subsidiary of the Philippines-based San Miguel Corporation. The sponsorship increased total annual prize money to A$220,000, with the winners receiving A$75,000 and the runners up A$45,000. On 16 July 2008 it was announced that Weet-Bix would take over sponsorship of the competition from the start of the 2008–09 season, and that the name would revert to the "Sheffield Shield" or the "Sheffield Shield presented by Weet-Bix". Weet-bix is a cereal biscuit manufactured by Sanitarium Health Food Company. In the 2017-18 season, JLT took