Right now you can try a box of OB Tampons for free. Click on the link below and then click on the coupon tab. Scroll down to the bottom of the page and select the coupon for $1 off. You will then be redirected to Save.ca, where you will find a coupon for a Free 18ct box of OB Tampons. Hurry, this won't be active for long.
PS: You can still order this coupon even if you did previously in late 2014, early 2015.