Free o.b. Tampons Coupon – Mail-out coupon Steven Zussino Published on Oct 5th, 2015 Coupons shares Order your free coupon for an 18 pack of o.b. tampons. This is a mail to home coupon, so you will have to log in to your existing account in order to access the mail to home coupon. Click here to get your coupon for a free 18pk of o.b. tampons.