$10 Off Cupon
I purchased two single containers, each had a $10 off cupon for the next purchase of a 3 pack. Note Walgreens had the single pack on sale this week for $19.95, I was able to use my old cupon from Regular Rogaine, it was for $10 off, so my cost was $9.95.
Looks like they are getting frugal with their cupons.