This flosser has a large capacity water reservoir, advanced 40-day battery life, and 3 pressure settings for a wider range of cleaning options. It is cordless and has a compact design, making it easy to use in the shower or on the go. The price drops from $39.99 to $17.24 when you apply the coupon code "25OA85J8" at checkout. Shipping is free for Prime members or on orders over $35.