No I hadn't forgotten about these, this one's number 5 in the series! Its trying to get the lighting how I want it that I find a real struggle, especially on a dull day using light from a kitchen window (with the assistance of a couple of mirrors).
I couldn't quite capture the fizz how I wanted it, but this is as close as I could get with my camera, well - without wasting all the alka seltzer in the house
matt