Abstract: The disclosure relates to a carton for a diagonally cut sandwich or like foodstuff formed from a blank of card and having triangular end walls connected by rectangular side walls to form a triangular prism-shaped container. One side wall of the container is hinged to another wall of the container to provide an opening for insertion/removal of foodstuff and to form a lid for closing the opening. The edges of the opening have out-turned flanges and the periphery of the lid overlies the out-turned flanges encircling the opening when the lid is in the closed position whereby the lid can be bonded to the flanges to seal the contents of the carton.