Walgreens has  Crest Pro-Health Complete Protection Toothpaste for  $4.99, buy 2 and they have Crest Pro-Health Advanced Whitening Toothpaste on sale for $3, buy 1.
Use the $3/2 Crest Toothpastes digital coupon
Use the $1/1 Crest Toothpastes digital coupon
You get $5 in register rewards. Use the $3  Crest Pro-Health Complete Protection Toothpaste Ibotta offer(limit 2), to make it free.

Walgreens has Mentos CleanBreath Mints on sale for $1.29. You get $1.29 in register rewards, to make it free.

Walgreens has Colgate Toothpaste, Mouthwash or Toothbrushes on sale for $4. Use the $4/2 Colgate products digital coupon. You get $4 in register rewards when you buy two select Colgate Toothpastes, Mouthwash or Toothpastes to make it free.

Walgreens has Colgate Total Toothpaste on sale for $3.99 each this week. Buy 2, use the $4 off 2 Colgate digital coupon. You get $4 in Walgreens cash when you buy 2 to make it free.