Walgreens has Crest Toothpaste on sale this week for $3. Buy 3 and use the $5.00/3 Crest Toothpaste 3 oz. or more, Crest Mouthwash 473 or larger, Oral-B Mouthwash 475 ml or larger, Oral-B Adult Manual Toothbrush, Oral-B Glide Floss, Floss Picks, Interdental Brush, Interdental Picks OR Fixodent Adhesive 1.4 oz. or larger Walgreens coupon. You get $4 in Register rewards when you buy 3, making them free.