Scales. Mix by weight, keep it simple and save time.
I still use syringes to draw my nic out of glass bottles, and from the few concentrate bottles which don't have a nozzle.
Every silver lining has a cloud.........since getting scales mixing has become so easy I just make a mix at the drop of a hat. My desk is covered in 3/4 full 10ml bottles which I know I will never vape.
