Visit Walgreens this week for a terrific deal on Crest mouthwash, toothpaste and Oral-B toothbrushes! This week, select varieties of all three are on sale for $3.99. Buy three and earn a $6.00 Register Reward at checkout. For the best deal, buy one Crest Scope Mouthwash, one Crest toothpaste and one Oral-B toothbrush. Clip three digital clip-to-card paperless coupons to save a total of $4.00. The final price is $0.66 each.