This is the classic silver-plated recipe cocktail shaker, first designed in the USA in 1933, and made in England from 1935.
The upper part of the shaker turns and an arrow points to one of many possible cocktails engraved on the inner rim. The ingredients and measurements for each cocktail are revealed in the "windows" around the body in order for each drink to be made and mixed to perfection.
It was marketed originally as the Tells-U-How Cocktail Mixer that "Tells at a glance the correct ingredients and exact proportions". A design classic.
