In Reply to: URGENT - Buying duty free posted by mattos on Monday, 6. October 2008 at 08:54 Bali Time:
For simplicity, after you go through passport control and are in the departure area you can buy and carry it on. If you buy before you go through you can't pick it up until you go through passport control.
There is a duty free bottle shop in Denpasar on arrival but if you have already had a long wait at VOA you won't feel so much like bothering. I don't know what the prices are like on arrival in Denpasar but they are pretty good when departing.