Australian juice company Boost is giving away four bitcoins -- one a week, for four weeks -- to those who buy some juice and enter a code in the Boost app.

You thought you had to pay real money for bitcoin? Well you could do that, or you could enter Boost Juice's competition and win a bitcoin instead. If you live in Australia, that is. 

The Australian company on Monday announced its latest publicity stuff: it's giving away one bitcoin -- an actual full bitcoin, worth (at time of writing) around $10,500 (AU$13,200), each week for four weeks. All prospective entrants need to do is buy a Boost juice and enter a code in the company's iOS or Android app.