Found. Floating 700 metres offshore on the Pelican Point sail run,
one only can of Carlton Mid strength beer complete with top quality stubbie holder.
Thanks. (burp!)

(I spose i could have offered to return it but knowing that sometimes people take a long time to claim lost property, and beer has a limited shelf life I thought I had better make sure it hadn't gone off already. But then having opened the can and trying it I then realised it would go off even faster so it seemed a shame to waste it. It was delicious. All of it.
So i spose if it was yours you can disregard this message.