I've become really good at 'plucking pollen' by guiding the anther into a test tube (12.5 X 75mm) and trapping it there with my index finger, then a slight pullback and the anther drops to the bottom of the tube. I usually can get 6 to 12 anthers per tube. I'll then tear off a little cotton from a cotton ball to provide a temporary seal. Once back at the house, the contents will be dumped into a Dixie cup to dry for 5 to 10 days in a cool well ventilated dark room (low fan), then put back into it's original test tube for freeze storage. I keep pollen on a 5 year rotation. Also, I now use plastic caps on the test tube storage samples rather than the cotton plug.