Smile, dear. It confuses people.

Mid-century advertising style, redrawn: a fifties illustration with the sparkle and a line it would never have printed, in black and red. Retro sass on a mug.

A glamorous woman in cat-eye sunglasses and a polka-dot headscarf, sly half-smile, delivers the line straight: Smile, dear. It confuses people.

Ink line and halftone shading, a scatter of star sparkles, proper mid-century advertising style, wrapped clean right round the mug so the line reads whichever way you turn it.