I have syringes. The problem is then doing the flavors. I can get exactly the ML using those. THe issue is the flavors. Some come as droppers, some open and I have to use my own droppers. The drops from the flavors will not be exactly the same. Is that ok as long as the pre-mixed liquid is the same?
let me re-say that. I am supposed to do 19 drops of liquid and one of flavor for 5%
18 drops of liquid and two drops for 10
17 drops of liquid and three drops for 15
how do I do this when the drops will not be the same each time?
Yes. It will be fine. If this is just for testing flavors, I don't think it needs to be that exact. You can use a dropper for the flavors not in a dripper bottle. The difference in drops for tasting purposes isn't going to matter that much. They will be close enough to give you an idea of what it will taste like and you'll be using the same dropper or dripper bottle when you mix a real batch, so it will be the same in the final mix.
Canoeist has the best idea. Mix up that 30ml bottle to drip the juice drops and just use a dropper to drop the flavors not in a dripper bottle and use the dripper bottle for the ones that are. That will be fine. You'll be fine. The only thing here that you need to be that exact with is your NIC juice levels.