Piña Barware Bell Jigger, Houdini Double Jigger Cocktail Accessory, and Cocktail Kingdom Japanese-Style Jigger. All three are designed for spillage-free pours, though the OXO is likely the best ...

But your kitchen likely already has gadgets that double as barware to help you measure ... Remember this simple rule: one liquid ounce from a cocktail jigger equals about two tablespoons.