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One of my favorite uses for this glass is The Manhattan. I grew up in a cocktail drinking household and we've always made some sort of spirit glass. It has been fun and curious to watch this trend come around again with such exuberance.
So Glad You Asked...
If you are looking for a thorough and fun reference for cocktail history and recipes, you may want to take a look at the book Vintage Spirits and Forgotten Cocktails by Ted Haigh (published by Quarry Books).