Tizer, the iconic ruby-red citrus-flavored drink, debuted in 1924 and has been part of the A.G. Barr PLC family since 1972. In 2007, Tizer underwent a rebranding and recipe change, removing additives and E numbers. However, its availability remains limited compared to other Barr classics like Irn-Bru and Dandelion ‘n’ Burdock.