Buy 1 Get 1 FREE Propel CouponOctober 8, 2010 by Mitchell Wischmann This post may contain a link to an affiliate. See my disclosure policy for more information. There’s a new rare buy one Propel 20 or 24oz, get one FREE printable coupon! This is a SmartSource coupon and will print immediately after clicking the link. Click the link again to print an additional coupon.