The green goo will yield about 1 cup - which is enough for 5 syringes with 1 1/2 oz in each. The nutrition info listed below does NOT include the green goo. You will only need 1 syringe per cocktail unless you'd like an extra for garnish.
Use gel food coloring for the green goo, not liquid food coloring. Gel will produce a more vibrant color and won't make it so runny.
Be careful when handling Green Goo because it can stain hands, clothes, and surfaces.