Chemist warehouse has a deal right now where you get a free backpack on purchasing 2 healthy care products. They seem to be alluding to the items with the dark green background, in which case the cheapest 2 items would be the emu oil for $9 each. However, theres nothing in the terms at the bottom of the page to indicate this specifically, it just says it has to be 2 catalog items. In that case, the cheapest item would be the paw paw lip balm for $2.70, making the backpack just over $5.
Its only instore, and only if your store has stock.
Those Chinese bulk buyers will have hundreds of these by the end of this month :-)