Starting 2/10 Walgreens will be offering $5 Register Rewards when you buy Three Crest Toothpaste or Mouthwash on sale for $3, use a Walgreens Digital coupon to pay $0.33 each (Valid thru 2/16)

Deal Scenario:

Buy (3) Crest Toothpaste or Mouthwash @ 3/$9
Buy Three, Receive $5 Register Rewards 

Use (1) $3.00/3 Crest or Oral B Dental Care (Walgreens Digital Coupon)
Pay: $6
Receive $5 Register Rewards 
Final Price: $1 when you buy THREE, like paying $0.33 each!