# If you need to measure the volume of liquid in a bottle of eyedrops, what unit would be the most practical?

Surely, $\text{millilitres}$, $1$ $m L$ $=$ ${10}^{-} 3 m L$
An eye dropper probably delivers a $0.1 \cdot m L$ volume drop by drop. How would you design an experiment that would test this measurement?
On the other hand, a Pasteur pipette, a much finer glass filament, delivers a volume of approx. $0.01 \cdot m L$ per drop.