Peppermint Certs from Cadbury Adams. Since 1956, Certs have been freshening breath around the country. The pocket sized roll helps keep your favorite mints handy all day long. Peppermint Certs contain Retsyn Crystals which give you a burst of minty freshness. You receive two 12 count boxes for a total of 24 rolls of Peppermint Certs.