Simple sugar syrup, or just syrup, is used in cocktails to make them balanced and of course sweeter. It is a must to have in your fridge. Make some syrup by adding 1 part sugar and 1 equal part water and heat until transparent. (100ml of each should be enough for several cocktails). This mixture doesn't need to boil. Fill up a squeeze bottle or a small glass bottle with a cork in it and you are good to go. Keep it in the fridge for weeks. If a party is being planned, so should a larger amount of syrup be made.