Perhaps you noticed the trend: 1 part fruit juice, 1 part simple syrup and 4 parts soda water. You can make a batch for twenty, or a personal sized soda to kick back with. Add some fresh fruit, add some extract, some spices, some herbs, some this or that and anything else. That's the beauty, whatever you have around can make a fantastic homemade soda! My recommendation is that per person one part is equal to one fourth of a cup.
Recipe Credit: Cherry Tea Cakes