Buy 1 get 1 FREE Purex Crystals Coupon! December 26, 2012 By: StephaniecommentDisclaimer: This post may contain sponsored content, affiliate links or review products. Regardless of this these are 100% our own opinions. HURRY to Purex Facebook page to print a RARE Buy 1 get 1 FREE Purex Crystals coupon! This is a limited time offer! Match this with a Buy 1 Get 1 FREE offer to get BOTH for FREE!