A childhood belief about adverts

When I was a child my Mom helped me order a yellow plastic canteen with a red plastic strap on it from the back of a box of Rice Crispies. In the center of the canteen was a sticker showing Snap Crackle, and Pop. At the time, there was a coresponding TV commercial promoting the canteen and cereal which showed Snap, Crackle, and Pop moving around and talking on the canteen. I waited and waited for what seemed like a year to get the canteen...checking the mail every day. When it finally came, I excitedly opened the box and fully expected to see Snap, Crackle and Pop, moving around and having fun on the front of my new canteen. When I saw that the characters weren't moving...I was sure that the canteen must have been faulty.