I was glad I had my coupon binder with me because Livingwell Canada (Johnson & Johnson) has a $5 Printable Coupon for the Listerine Whitening (which is the kind I use) on their site right now and I knew I printed off a couple coupons.(To get this deal you will need to purchase the Listerine Whitening 473ml)
Extreme Couponing Canadian Style! I purchased 2 bottles @ $4.99=$9.98+13% tax=$11.28-$10 in coupons= $1.28 The only thing you will pay is the tax!
Here's a copy of the coupon if you wish to print it from here(exp Dec 31/2011)