Kids in the pub

I initially thought that these two schoolkids were standing behind the bar in a pub, showing off their 4 ply acrylic round-necked school pullovers. But no, at second glance they appear to be in the middle of some sort of chemistry lesson.

I suppose the irony is that they are actually trying to alchemically create the secret recipe for WKD Blue Alcopops, which they are then going to bottle and flog behind the bike sheds at break time. It's all terribly Grange Hill.