Pay less than $1.00 for ACT Kids Fluoride Rinse at Walmart! It’s regularly $3.98 a bottle but is now on rollback for $2.94 – $3.47, depending on the flavor. I found ACT Kids Scooby Doo Kiwi Watermelon for $2.94. Use a $1.00 coupon and pay $1.94. There is also a $1.00 Ibotta rebate that lowers the price even more.