AA coins, also known as sobriety coins or chips, are small tokens given to Alcoholics Anonymous members to mark sobriety milestones. Originating in the 1940s, these coins are made from materials like plastic, aluminum, and bronze. They often feature inscriptions such as "To Thine Own Self Be True" and the AA symbol. Coins are awarded at intervals such as 24 hours, one month, three months, six months, nine months, and annually after the first year. These tokens serve as tangible reminders of one's commitment to sobriety and the support available through the AA community.