Drugstore.com現在Philips Sonicare Essence Sonic Toothbrush, HX5610/01原價$79.99,特價$39.95,右下方鉤選”Online Coupon: Click & save an extra $4 on select Sonicare” (如圖).再按”add to cart” 就可$4 off, 再由此$5 off $40 coupon進入, 然後到右上方購物車,輸入zip code, 按"get estimate"(如圖)就可再$5 off, 變成$30.95.免運費