Things that have appeared in the toilet - Part 2

This bottle of 'Sainsbury's Red Wine Vinegar' has recently appeared in the bathroom in my flat.

Had my flatmate taken up a cheap and eccentric drinking-habit? At 92p a pop, it seems far more affordable than 'real' red wine.

It later turned out he'd used it to clean the bath and sink with (and done a very good job indeed). I'd heard of malt vinegar being used for this purpose. Perhaps red wine vinegar is the middle-class solution, and balsamic is what the royal household uses on limescale?