That must have been for the Ozzie Market... I don't remember the accents, although I did buy the drink a lot as a child... The Stein's Garden Center by my home had a vending machine.
I think you're right. The other thing I noticed was the color of the drink seems less 'yellow' than what we're used to here in the US...
I noticed that, too. Here, it was fluorescent urine yellow, and in that commercial it looked almost clear.
That woman scares me! It's not just her looks, but the fact she can down a whole bottle of soda and not belch!