A lid for a medical container, the lid including: a body portion including a locating element, a tamper evident security connector integrally formed with the body portion, the tamper evident security connector including: an anchor portion, and a frangible portion； wherein the anchor portion is configured to attach to and be retained by an engagement portion fixed in at least one direction relative to the medical container, thereby positioning the frangible portion between the locating element and engagement portion, the frangible portion being adapted to break on relative movement between the lid and the medical container； and wherein the lid is suitable for use in an autoclave, the lid being formed from a material or materials that are capable of withstanding a temperature of at least 140°C.
