There are many ways and it depends on where you live and keep them. Also the amount of money you want to pay for supplies. A rather new item is the self sealing air tight cardboard 2X2's that are archival. They seem to work quite well and are not that expensive. hard plastic holders are usually not air tight but would take more handling. Also the coins need to be stored in a place that the temperature remains closely the same. If you have high humidity the silica gel needs to be used in the storage box, safe or drawer. Go to www.brooklyngallery.com they are a large dealer in coin and stamp supplies and have almost everything. Look to see what best fits your wallet and what you like. I use more than one system for many reasons as do most collectors.