Citrus Syrup

250 ml Water 
250 g Granulated white sugar 
1 Large lime, zest removed 
1 Large lemon, zest removed 
1 Orange, zest removed 

Heat water in a small saucepan over medium to high heat until it begins to simmer. 
Add the sugar and stir until fully dissolved. 
Add the citrus zests* and stir for 3 minutes and remove from heat. *Citrus juice can also be added according to preference. 
Let the syrup stand until it reaches room temperature. 
Transfer into a sterilised jar through a fine sieve and keep refrigerated for up to 3 weeks.