If you still have your Smart Source from 11/16 check it for a $4 Brita coupon.
If you have it you can combine it with a Target store coupon and grab this great deal:
Buy (1) Brita Bottle Filter 2 pk $6.99
Use (1) $4.00 Brita Filter coupon (SS 11/16/14)
Use (1) $3.00 Brita multipack Filter Target Coupon
FREE after coupons
Be sure to check out the rest of the Target Deals before you go!