L'Instant Taittinger Subject Giant Poster. Vintage French Kitchen & Dining Decorative Poster for home or office. L'instant Taittinger Vintage Advertisement Poster. Taittinger is a French champagne house. L'instant Taittinger, a champagne ad campaign, dedicated this piece of art to Grace Kelly. After appearing on the cover of Vogue magazine, Champagne Taittinger's posters featuring an image of Grace Kelly’s regal beauty were viewed as works of art.