I found this promotional item for the film this week, an insulated cup by iconic Australian brand Decor.
The mould was most likely from the 1960s having the engraved early logo and a 1980s logo appears as a sticker on the base. The yellow insert is also perhaps a 1980s refinement with the domed bottom.
Man from Snowy River 1980s version of the classic Decor insulated cup.
Decor insulated cup
Decor logo circa 1982 as sticker on cup base.
Decor Corporation logo circa 1982