According to the International Air Transport Association (IATA), passengers are allowed to carry a reasonable amount of medical supplies and assistive devices, including urine bags, to meet their personal health needs. This is to ensure the comfort and health of passengers, as well as to meet their special needs during the flight. Urine bags are a common medical aid, especially for those who have to fly for long periods of time or cannot leave their seats easily, travelers with bladder control problems or mobility issues.