A cigarette case/box (sometimes called a cigarette tin) is a sturdy container used to store small numbers of cigarettes and prevent them from being crushed. A typical cigarette case is a flat box (commonly made of metal) that opens symmetrically into two halves. Each half stores a row of cigarettes, which are often held in place by a spring or an elastic strap. Some cigarette cases are simply sturdy cases used to store standard cigarette packs.