Purex Crystals BOGO Coupon December 27, 2012 at 10:30 am By coupongeek You can sign-up for a Buy One Get One Free Purex Crystals Coupon. Thanks, Freebies4Mom! There are a limited number so be sure to grab one before they are gone! Like Freebies and Sweeps? Be sure to follow Freebies4Mom for more!