Maybe some black paper to put under the male plants. Because when you touch the male, pollen going to fly everywhere. The paper will fall on it to collect and store.So let them dry in the sacs or cut them open? I thought I remembered last time I tried cutting one open from a 2018 or 2019 male too early, all I got was a gooey mess.
Try not to have any "green" plant material when storing the pollen.
Like 10bucks for 400 of them. For seeds and pollen.
Cheers, good luck