A system comprising: a headphone case, comprising: a shell portion defining a storage space for storing headphones; and a flap portion configured to enclose the space; wherein the flap portion is connected to the shell portion by a pivoting member, and wherein the flap portion is rotatable from a closed configuration to an open configuration; wherein the flap portion includes a storage structure extending therefrom and into the storage space when in the closed configuration, the storage structure configured to store headphones in use and comprising one or more receptacles of complementary shape to the headphones to be stored; wherein the storage structure is not accessible in the closed configuration and wherein the storage structure is accessible in the open configuration; wherein the storage structure is mounted on and/or formed integrally with an inwardly facing surface of the flap portion; wherein the storage structure extends from the flap portion and is integrally formed with a pair of projecting wings, the wings (28a, 28b) being side walls of the storage structure and connecting the flap portion to a back wall of the storage structure; and the storage structure includes a flange to provide a stopping point such that the flap portion cannot be fully rotated away from the shell portion, thereby restricting the rotational movement of the flap portion with respect to the shell portion; and one or more headphones in the one or more receptacles. a headphone case, comprising: a shell portion defining a storage space for storing headphones; and a flap portion configured to enclose the space; a shell portion defining a storage space for storing headphones; and a flap portion configured to enclose the space; wherein the flap portion is connected to the shell portion by a pivoting member, and wherein the flap portion is rotatable from a closed configuration to an open configuration; wherein the flap portion includes a storage structure extending therefrom and into the storage space when in the closed configuration, the storage structure configured to store headphones in use and comprising one or more receptacles of complementary shape to the headphones to be stored; wherein the storage structure is not accessible in the closed configuration and wherein the storage structure is accessible in the open configuration; wherein the storage structure is mounted on and/or formed integrally with an inwardly facing surface of the flap portion; wherein the storage structure extends from the flap portion and is integrally formed with a pair of projecting wings, the wings (28a, 28b) being side walls of the storage structure and connecting the flap portion to a back wall of the storage structure; and the storage structure includes a flange to provide a stopping point such that the flap portion cannot be fully rotated away from the shell portion, thereby restricting the rotational movement of the flap portion with respect to the shell portion; and wherein the flap portion includes a storage structure extending therefrom and into the storage space when in the closed configuration, the storage structure configured to store headphones in use and comprising one or more receptacles of complementary shape to the headphones to be stored; wherein the storage structure is not accessible in the closed configuration and wherein the storage structure is accessible in the open configuration; wherein the storage structure is mounted on and/or formed integrally with an inwardly facing surface of the flap portion; wherein the storage structure extends from the flap portion and is integrally formed with a pair of projecting wings, the wings (28a, 28b) being side walls of the storage structure and connecting the flap portion to a back wall of the storage structure; and the storage structure includes a flange to provide a stopping point such that the flap portion cannot be fully rotated away from the shell portion, thereby restricting the rotational movement of the flap portion with respect to the shell portion; and one or more headphones in the one or more receptacles.