If you email the makers of Brunswick products (sardines, kippers, etc) they will sent you coupons. Just check the expiry date on them when you receive them. I got a couple expiry ones and I recontact the company and they asked for me to mail them back and they issue new ones.
Bumble Bee is the maker of Brunswick products.
http://www.bumblebee.com/
They are the maker of several different tuna/fish product lines.
