Can you finish this phrase from a memorable 1963 cigarette ad, "Show us your...!"?

Introduced by Liggett & Myers in 1963, and notable for its charcoal filter and past advertising campaigns, one of which became it's most famous, featuring people on the street being asked to "Show us your Lark pack" was launched in 1963 by Liggett & Myers with its trademark charcoal filter in an effort to halt a five-year downward drift in sales. The distinguishing feature of the brand, both in terms of physical characteristics and taste was the 3-piece "Keith" filter (the middle section of which contains small charcoal granules) which purportedly reduced the harshness of the cigarette's smoke.