They must have had a plastic cup inside the coffee mug or something, but it looked like they poured the coffee and about a half cup extra kept filling above the cup, as though there were extra cup there. (Of course in real life it would just have spilled over.)
I don't know what brand it was, but I always wished my mom would have bought it because I thought it would really happen! This commercial would probably have been made in the early 60's.
I've asked other people, and they remember the commercial but not what company it was.
Thanks!
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