Every now and then, but especially when I lived on Great George Street, I used to see a guy riding his bicycle down Sydney Street (the wrong way on a narrow one-way, mind you), carrying his case of beer in one hand and steering with the other. He could use this.
Someone has ingeniously re-purposed an urban bicycle polo mallet holder to act as the perfect 6-pack carrier for bikes.
But... urban bicycle polo, you say? What's that? I had no real idea, either, until I saw this.
In related news... this, of course, is not the first bike to move beer: