Wrong bottle

[jbanana]

I was organising some science activities with kids, and one involved a bottle of cola. If you remove a little cola from the bottle and replace it with milk, you might think that you get slightly milky cola. In fact, the fat in the milk reacts with the acid in the cola, coagulates, and settles out at the bottom, taking the brown colour of the cola with it, and leaving most of the bottle holding only cloudy water.

So I told the parents that their kids would need, among other things, a bottle of cola. I got an email from a parent.

[Kid's name] is hoping to take part tonight. She went shopping for cola and unfortunately was too short to reach the cola so she came back with Fanta fizzy blackcurrant. Will this be a problem?

I reassured her. But as I didn't run that particular session, so I can't report what happens if you put milk in Fanta blackcurrant.