Amazon with GD-TECH has the 18-Ct Gloridea Professional Teeth Whitening Strips for $15.99 - 10% off with Subscribe & Save (can cancel anytime) - $6.40 off with coupon code Z5EPIQ6D [Exp 7/4] = $7.99 with free shipping on $25+ or with Prime. Include 7 treatments of Professional Effects White Strips for daily whitening and 2 treatments of 1-Hour Express Whitening Strips.