50 Double Pocket 2.5x2.5 SAFLIP Safety Coin Flips Each flip stores either two coins or one coin and a cardboard insert. Cardboard inserts are not included. SAFLIP safety flips are intended for long-term storage of your coins. They are made entirely from polyethylene terephthalate, an inert and archival material. hey are non-plasticized and contain no PVC or other chemicals which can harm your coins over long periods of time.