Sirius, trying to embrace every aspect and angle of Muggle culture, attempted and almost succeeded to drink Coca-Cola once.

He took one mouthful, them almost threw up the contents of his stomach. His face was drained of all colour, his eyes were gaunt and he had a peculiar expression on his face

"My mouth feels and tastes as if I just made out with a drunk pirate with scurvy." He muttered darkly as he walked out of the room in search for a toothbrush.