If you live in the USA and can shop at Costco, they sell various sizes, including fairly small, of good-quality brown paper bags in blocks of several hundred. I always used these for holding my bulbs while filling sale orders, and when I moved to my new place recently, I had a lot of bulbs (those without perennial roots) stored in them in the basement for a little over a month. They're easy to write on with a large marking pen and can be reused. The size sold for, I think, holding wine bottles is excellent for collecting seedheads on their stems -- I put them upside down into the bag and leave them in a dry room, and can get them to release some of the seeds that way, which is a relief from trying to clean Alliaceae and Themidaceae seed capsules. Jane McGary