Panasonic via Newegg offers its Panasonic Portable 2-Speed Oral Irrigator, model no. EW-DJ10-A, for $49.99. Coupon code "PANATM30" drops it to $19.99. With free shipping, that's tied with last week's expired mention and the lowest total price we could find by $17. It features 2-speed water jet flow and 1,600 pulses per minute. Deal ends April 30.