1 part Cherry Heering
1 part Soda water or tonic water
1 part Orange juice
There are many good cherry liqueurs you can use, but I prefere Heering. Add one share of the liqueur. Then you add one share of Soda. For a sour sling use Tonic (most people prefer the drink without Tonic). Afterwards you fill the glass with Orange Juice and ice cubes.