After getting tired of....finding FP, measuring out 1/4 teas., putting it back, getting vinegar, measuring out 1 capful, putting vinegar back, and repeating, I came up with what I think is a good idea.

My SoftSoap dispenser puts out 1/2 teaspoonful per pump. So I took an empty dispenser, washed it out and filled it half full of FP and half full of vinegar. Keep it by the sink, one pump (or two if it's early-mid spring) and fill!