Stirring a great cocktail is an essential skill when it comes to bartending. But like any other method, the right tools are required––in this case, a quality mixing vessel. It should be functional above all, constructed well and with good materials, and preferably easy on the eye if we're being picky. Historically, glass has been the go-to, though today, metals are becoming more and more popular, and both options have their own pros and cons. So the question is: how does one go about choosing the perfect mixing vessel? Donny Clutterbuck of Cure Bar in Rochester, New York breaks it down for us.