Pill reminder, better than postit notes

Make this pill reminder at home for free and brag a little.
I drew seven circles in a clump,using the pill bottle base
and labelled them Monday to Sunday.
When I take a pill, I put the pill bottle down on tomorrow's date.
That's all. 
If the pill bottle is sitting on today,
I haven't taken it yet.
 I was having a hard time remembering at 11 pm
if I had taken the pill at 8pm or was it the day before?

This won't work for everyone but is great for a single prescription.  Someone could print a bunch of these on plastic and sell them by the dozen.