2L jug makes 34+ cans at 5:1 ratio. Fill the box with 8L to maximize shipping value. Pops are a 5:1 ratio. The colder and more carbonated your water the less syrup you'll use. Start with aprx 125ml or 3-4 pumps for a 1L bottle and adjust +/- from there. Experiment with the number of pumps to find the amount that suits your taste.