Starting Sunday 4/22, CVS will have an ECB deal to get you free Blink Tears. Print a coupon good for $1 off, which turns this into a money maker.
Blink Tears 0.5 oz. or Gel Tears 0.34 oz. $8.99
Earn $8.99 ECB (limit 1)
-$1/1 Blink Tears printable
Final Price: FREE with $1 profit
NOTE: Printable coupons are only available for a limited time. If you plan to do this deal, best to print it now.