Post date: May 30, 2016 3:51:25 PM
As most bartenders know, certain types of cocktail shakers have a tendency to contract when ice-cold, and can therefore be a bugger to open: So why not pierce one of the metal ends with a single hole (perhaps made with an ice-pick and a hammer) which will be covered by the thumb during shaking, and then the thumb is removed to release the pressure and thus make the parts of the shaker easier to separate. The aperture of the hole must not be too small so as to cause a jet of liquid, and not so big as to be difficult to cover with the thumb.