Check your stores. I have seen different products on clearance at another store, such as Colgate and Listerine. Picked up these three items for $2.23.
Crest 2pk $3.12 w/$2 digital
Crest Kids $1.80 w/$2 digital
Act $2.56, used $1.25 printed coupon. There is also a $1 digital in the store app. I'll happily pay this for my favorite mouth rinse.