(CNET) - An Australian brewery dug deep into its own belly buttons to create an unusual beer brewed with human-harvested yeast. Yum, cloves and banana.

The basic ingredients for beer include water, malt, hops and yeast, but nobody said you had to buy that yeast in a sterilized packet at the local brewery-supply retailer. The brewers at Australian beermaker 7 Cent Brewery gazed deeply at their navels and came up with the novel idea of crafting a beer from their own personal yeast strains.

The brewery describes Belly Button Beer as"perhaps the first beer in the world fermented from yeast captured from the brewer's belly button fluff." The brewmasters unveiled the tummy-tastic libation in late April.

Several different brewers offered up their belly buttons for swabbing, and the samples grew strong on agar plates. The brewery isolated the yeast colonies from those plates and grew them into quantities sufficient for making some test batches of beer.