Amazon with CREMAX-US has the CREMAX Professional Cordless USB Rechargeable IPX7 Waterproof Water Dental Flosser Oral Irrigator with 320ml Water Tank for $34.99 - $3 off coupon (check green "Save coupon" box) - $7 off with code MEJW787O [Exp 9/30] = $24.99 with free shipping on $25+ or with Prime.