>> saving those little silica pouches that come in vitamins etc. that keep the pills dry ... they will also keep the seeds dry.
Unfortunately, a small amount of silica gel such as those pouches contain will only absorb a small amount of humidity before it becomes saturated and loses its power to keep things dry.
Silica gel can be regenerated by 2-4 hours at 250F, but I'm betting that will melt and/or scorch the pouch or the pellet.
I bought a pound and a half of silica gel from a craft stroe (flower-drying isle). Maybe $6-7. I staple a tablespoonful into paper coin envelopes, but you could roll and fold some paper around a smaller amount and fit that into a pill bottle. Kept very tightly sealed, a pound of silica gel would probably be enough for thousands of pill bottles, so you could replace them every few months if you needed to.
I put small seed packets (2x3" Ziplocs) into large plastic tubs (I think they held 2 pounds of peanuts or a similar amount of peanut butter. Then I drop the Ziplocs with seeds and one coin envelope with silica gel into each big plastic tub. Every time I open a tub, humid air rushes in, so the silica gel packets only last 4-12 months.
Also, if I use too much fresh silica gel and don't open the tub for a month, it gets down below 10% relative humidity, which is dryer than is really good for seeds.
