Fluid transfer pump - used for filling gearbox for example

[Momac]

I obtained and used one of these for filling an otherwise awkward /difficult to fill gearbox. It was slow but then it needs to be as over enthusiastic filling leads to spilled oil. 

The process was much more physically comfortable than my previous method using a small funnel. The marks on the side of the bottle proved to be quite accurate for measuring the correct amount of oil.