Asrisuk via Amazon offers its Asrisuk Water Jet Flosser for $39.87. Coupon code "6KNHPU6X" cuts that to $29.50. With free shipping, that's $10 off and the best price we could find. It features a 20-oz. tank, six settings, eight flossing tips, four dental tools, and 360° tip rotation. Deal ends October 31.