Here's another use for the junk mail. Sometimes, companies include a blank envelope in their mailings. I keep them in a folder to use when I begin to harvest my veggies. I had a good harvest this year with all the rain we had.
When I dry the seeds, I store them in these envelopes and tape it shut. The envelopes get stored in a drawer in my dining room where temps are consistent.
Yesterday, I just dried some cantelope seeds and seeds from an enormous cucumber that my neighbor dropped off. We'll see if I can grow them next year.