Half a Glass

In a couple of weeks our photo group competition is ' Refracted Light ' and it is proving quite a challenge.
I have a few ideas but little time to execute them...........I finally had half an hour spare so I thought I would have a go at one of my ideas........I've seen this done many times but never actually tried to do it before........it's not exactly what I was aiming for and far from perfect but it's the only thing I've photographed today, so it will have to be my blip :-)
Any tips on how to do this properly or any other ideas on something I could have a go at would be most welcome, if any of you have any :-)

Slightly cooler today at just 25 degrees, so I'm very relieved........I hope it lasts a few more days this time ;-))