They could just keep the glassware in the freezer. That would be more efficient, more practical and save time but …
It’s all about the ice, about the ice, about the ice. It looks cool (pun intended) in the glass and is part of the ritual of authentic cocktail making.
I just wish they did not have to throw away!
Photo: Robert Rath, ‘It’s all about the Ice’, 1/30s f/1.4 ISO640 50mm