maybe it was Acme Dynamite, the brand that crazy coyote uses.
My brother used to live in England (well before 9-11). My mom was shopping at an outlet store which had Looney Tunes and other character merchandise for sale. She found a plastic bomb with a Wily Coyote t-shirt inside it and bought it for him.
She was really, really nervous about mailing it! Nothing ever happened though.