We drink a lot of iced tea so I buy family sized tea bags. Certain brands of tea have a paper "envelope" around the tea bag. I save these and when I come in from the yard with a handful of seeds, I just stick them in one of these, fold the top down, tape it and write the name of the flower on it. The seeds won't mold or mildew, and although you may wind up with 10 envelopes of flax seed, if you want to, you can combine all of them into one container later on.