This is a good way to ship seeds safely, and it usually only costs the price of a first-class stamp to mail. I realize this is not groundbreaking, and many people have been doing it this way for awhile, but I thought I would share here in case there are people who haven’t seen this method of shipping.
Get a coin flip (one of those cardboard sleeves used to collect and display coins) and a hose washer. Place the seeds inside of the hose washer, like this:
Generally, the hose washer is thick enough to protect the seeds from being crushed.
Fold the coin flip with washer and seeds inside in half, and seal with tape or a staple:
This can be placed in to an envelope and shipped usually for the price of a singe first-class stamp.
If you want to get extra fancy you can put it back inside of the breeders pack, though it may ending up costing you a few pennies more to ship, if the envelope is too thick:
It costs about a quarter for a coin flip, and the hose washer is just a few cents. So, using this method, along with the cost of an envelope and a first-class stamp it is possible to send off a pack of seeds to someone for under a buck (or the cost of an airmail stamp for anything sent out of your country).