A tip we discovered on our recent trip to wonderful Bali The VOA can be purchased from your local Indonesian Consulate before you leave Australia ( the Adelaide one is on Greenhill Road) Take your Passport with you, fill out the forms, pay the $25US and get it done before you go. I think you have 30 days to use it before it expires. Saves one lot of smiling faces as you pass through the airport.
My case came through with white crosses( gone with wipes) and my friend's didn't, both had cask wine, 2litre ones but mine also had 2 one litre fruit juices so I think the xray picks up fruit juice containers, maybe foil lined??