During the first few months of treatment on 2 occasions I could not remember if I had taken my pill or not. I take my pill in the morning while I am getting ready for work. I am constantly running late because I am not a morning person. After 6 years of a 9-5 job you would think I would have adjusted but no such luck. Maybe that will come with age in my 30s. As we all know it would be very dangerous to take a double dose of any of our TKIs in one day. This cap fits on the top of pretty much all pill bottles and it marks the current time and day on the screen any time you open the pill container. Comes with an empty pill bottle to use as well. You can also set an alarm to go off at a certain time to remind you to take your pill (although I don't use this feature). I just like to be able to confirm that I never miss a dose. In the event that you ever think you may have forgotten to take your pill you can always check the timestamp on the top of the container and take your dose a few hours late without worrying that you doubled up. It is a little expensive but it is sturdy and foolproof and I think it is worth the piece of mind.