I saw a video of a novel way to sow carrot seeds. They are like many plant seeds, very tiny and hard to get a proper pinch. The person took the entire packet and dumped it into a short cup of fine sand, mixed it up well then used the extra volume to sow just a few seeds.

"Easy way to plant tiny seeds - simple and cheap"

I wouldn't use play sand. Get something called Paver sand, it seems to me to be finer and more uniform. Its sand for laying patio stones.

With that in mind, perhaps you could take the entire seed head and put it into a bit of sand. As long as the sand was dry, the seeds should last for a couple of years, and you could reach in and grab what you need. It would also make sharing them easier since you have more volume.

We take the lazy way. We let (they do it on their own because we're not paying attention) a few plants bolt and they self-sow all over the place.
Then, in the next spring, I harvest whatever grows up between the paver cracks or the raised beds. Lettuce loves growing between pavers but I have no idea why.

It's not an effective way to save seed or to breed a new variety exquisitely suited to our growing conditions but I do get lettuce.