Ok, I just read a sticky on it from a different site. Said to get a sealed vial, reconstitute with 1 ml of water, add desired additional water to vial, then squirt in reconst liquid and refrigerate
I just checked again, and the rubber stoppers come in 25, 50, 100, 500 or 1000 count unless I'm looking in wrong place. Prob best to put in the sealed vial anyway.