Tracked by Evreward since 2006, Lather.com offers coupons, cash back rebates and rewards, with savings as high as 20% off. Lather.com discount coupons are somehwat rare, available a few times each year, but are often more valuable than similar merchants. Even when Lather.com doesn't have a coupon, you can always get up to 10% cash back, and other great rewards, with every purchase.