Fill each one with three or four pills! You're not going to accidentally take all three, but it'll still keep track of whether you've taken it or not.

Or get the box that's sun - sat morning, afternoon, evening boxes, then it's three weeks at a time.

I just got a little tab that hangs off and it has 7 poppers on it, and you pop in the day of the week when you take it. No refilling