Golf Ball

This is the infamous Strathalan Gold Ball puzzle. It lives in the staffroom. The golf ball is not usually on the peg, it swims about in the liquid. You have to try to flick it up onto the peg with some degree of skill and accuracy. I have never managed to do this until this year's trip to Perth. I actually managed it twice, both times under the influence of a couple of glasses of wine... or was it gin...