I guess it's probably 4711 Eau de Cologne. I know they sell it there. Lovely scent, and cheap too. It's been in production since 1792.
I've got a bottle in the bathroom, and I always have a mini bottle in my rucksack.
Edit: Just Googled and it appears that people are indeed using 4711 as hand sanitiser! https://www.youtube.com/watch?v=R_dfvT0nrcs