This is a Browne jigger with stainless steel construction, and a sleek satin finished interior. Its smooth surface makes it easy to clean.
A double jigger allows you to simply flip the jigger for different measurements. Say you're making a margarita. You'd take the jigger, measure out 1.5 ounces of tequila, pour it out, measure out 1 ounce of flavoured liqueur, pour it out, and add about .75 ounces of lime juice. Then you're done. Double jiggers are really easy to use and as a result they are an essential piece of equipment for many bartenders.