Tipping is not a must in Switzerland as service is always included in the price. However if you were pleased with the service you got, tips are appreciated and in restaurants many leave 5-10 percent of the bill or at least round up a couple of francs. In bars with self service it‘s very common to round up the bill to the next franc, or add an additional franc (i.e. drinks cost 15 Sfr, you give 16Sfr).