My stuff gets so much use that it is constantly being refilled with new supplies but I know from experience how quickly stuff can disappear, disintegrate or expire if one is not paying attention... Originally as per advice of someone on the list I kept a sheet with expiration dates but since my friends realized I’m a walking pharmacy I put my kit to good use. It was annoying at first since I hat to disassemble my kit on order to get a band aid out or a Tylenol but with time I got very proficient in using my kit and repacking it and making priorities in terms of having right supplies available first.