Cap'n Crunch (commercial, 1966)

Uh-oh. It's on the foot, the barefoot pirate. Now, Capitan, you will tell me the secret. Secret? The secret of what makes Captain Crunch cereal so crunchy. Oh. Well, you see, Captain Crunch is made of two nourishing grains.

Corn for Crunch, oats for Punch, sweet and just right, and... But how does he stay crunchy even after you put on the milk? Oh, that's a secret. I know it's a secret and I must have it. Give it to me. Give it to me.

Very well. Sidog, give it to him. Hello? Quaker Oats company? Say, how does my cereal keep its crunch? Uh-huh. Yeah, I thought so. When? Just as I thought. It's a secret. Let's go, Sidog. I hate to see a grown pirate crunch.

Captain Crunch from Quaker Oaks.