Please note that spray vials are never full, they are made with room in them for the pressure, Vials generally are the same size and can fit around 2ml so when you buy a 1ml or 1.2ml sample it will look almost half full and that is not because it's used, it's because the manufacturer uses a standard size vial and put less liquid in it than they can fit.
May say "Sample, not for sale on package"