At Amazon, this Waterpik Cordless Pulse water flosser is $20 off, $3 under our last mention, and at a new Amazon all-time low of $30. It is also below its 90-day average of $42 on Amazon. The American Dental Association has given Waterpik water flossers its Seal of Acceptance, and the unit carries a 2-year limited manufacturer’s warranty. Shipping is free. Buy Now at Amazon