|Description||Red capped aluminium cocktail shaker top with built-in juicer|
|Material||Metal - aluminium|
|Diameter||External: 100 mm, Internal: 94 mm|
|Mary Walker No.||Not listed|
|Notes||Top of a cocktail shaker.
I have a few of these all without bases suggesting that it may have been a stand-alone itop to sit on any glass.