We have oil and vinegar coming in the same shape plastic bottles. Originally, vinegar had a red cap, sunflower oil a yellow one, and rapeseed oil a green one. Then some idiot decided to save 1/10 cent and gave vinegar the same green cap as the oil.

I had the large stainless steel pan heated up really hot, so that a few drops of water happily run around it on a steam cushion and evaporated quickly. And then I wanted to pour in a good helping of oil...