Six pack of Mermaid’s Cave paper cocktail umbrellas in a poly bag with header card.

This great mid century design is adapted from cocktail napkin artwork used for the long defunct Mermaid’s Cave bar in Detroit, Michigan. Napkins and swizzle sticks from Mermaid’s Cave boasted “Detroit’s Loudiest Cocktail Lounge.” Now you can have your own “Loudiest Cocktail Umbrella” set.