Barillio 20 Oz Crystal Cocktail Mixing Glass Set Seamless Mixing Pitcher for Stirred Cocktail with Weighted Bottom Old Fashioned Kit for Bartenders sold2024 At Home or Other Venues B007XBSJDO At Home or Other Venues Celebrations [Advantage] The transpatent acoustic tube behind ear has better concealment and mushroom shaped earbud fits snugly in the ear makes wear strong and keeps your audio clear and conversation private Barillio mixing glass thick walls are better insulators and the capacity (20oz) is ideal for home bartenders to mix drinks for a group of friends like real pros For beginners there is also a pocket sized booklet with stirred cocktail recipes