We really enjoy these "Tins" from Pomegranate. Each 100-piece, cardboard puzzle in this creative collection comes in its own hinged, metal box. These boxes allow secure and convenient storage of puzzle pieces and make transporting them a breeze. Pop one into your briefcase or purse and never be without a puzzle while away from home! They also provide very nice puzzling options whenever time is in short supply. Plus they make marvelous gifts!