As advertised on page 16 of this week’s Walgreens ad, Crest Sensi-Relief toothpastes and mouthwashes are on sale for $4.00. Buy three and earn a $3.00 Register Reward at checkout. Plus, buy three and score a free 10-pack of Crest Sensi-Stop strips! (These are regularly $27.99.) Use a couple of coupons to get three toothpastes and the Sensi Strips for $7.00 total!