Get a free sample of Special K's protein "meal bar" when you register on their site. Share your name, address, e-mail and set up a user name and password. You'll also get $1 off coupons for protein bars and Special K's protein shakes with your free sample, which should arrive in 6-8 weeks. You can sign up for their e-mail list or opt out.
Caveats: limit one free sample per household. While supplies last. Offer valid in the United States only.
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Free Special K protein meal bar plus coupons