Yep, bacteria was a concern for me, so I keep it refrigerated.
There's a scientific supply shop in town, a graduated cylinder cost me 15$ for a 25ml clear plastic one. I'm sure online you could order one for a few dollars from China.
While I have used a micropipette before (woo, HS biology electrophoresis panels) I would be somewhat concerned about sediment (there is some) and variability between such small doses. I'd assume that more solvent would result in more accurate doses.
But hey, if it works, that's another option...