After posting a similar thread a few months ago, im glad to report in with some great results.
For figure painting, i mainly use Vallejo, so i scrounged up an empty bottle and use it for demineralised water. I also have a similar Vallejo-esque style bottle, but it has a smaller dripper, just in case i need to cut the consistency of the paint to a smaller amount.
I managed to pick up two medicine droppers from my local chemist; one for acrylics, other for enamels and oils. Bacause it has a ruberised teat on the end, the shelf life of the enamels/oils dropper wont be long.
Also, I managed to pick up some 30ml plastic measuring cups (with measurements on the side!) from my LHS, purposely build for modellers. They come in a pack of about 40, and are disposable.
Has all of this helped my technique? Yes - definitely. Are my models looking any good? Im sad to say, no. I still suck... :-)
Cheers,
Aaron.