Sanifair is a subcompany of Tank & Rast GmbH, a company that is managing most of Germany's highway service stations.
Sanifair is responsible for the sanitary installations along this service stations. You'll find a chilled out atmosphere (even with music) and mostly very clean and hygienic toilets there, so great to make a break while hitchhiking, even if you only need some fresh water to clean your face/hands.
They created their own concept for paying:
If you want to use the toilets, you have to pay a fee, in most cases this sould be EUR 0,50. You'll get a coupon, and with this one you are able to get a discount of EUR 0,50 at the shop in the service station (e.g. you can get a box of matches for free). It's also possible to collect some more of these coupons, you can convert them all together into one product you might want to buy.
If you're alone in front of the Sanifair entrance (e.g. at night), you can also jump over the barrier to get into the toilets for free. It's free for children anyway.
Currently you can find more than 300 Sanifair installations in the federal states of Baden-Württemberg, Bayern, Brandenburg, Hessen, Niedersachsen, Nordrhein-Westfalen, Rheinland-Pfalz and Schleswig-Holstein.
Even if you don't have to, try to use the toilet, its cleaning procedure is amazing! Don't get up the toilet before you're finished, though.
- Sanifair (German)