For many at-home mixologists, the hardly leak-proof, three-piece cobbler shaker\u2014ubiquitous in Bond films\u2014is the go-to mixer. But Rob Krueger, bar director at Extra Fancy in Brooklyn, says most bartenders prefer the Boston shaker. This metal-and-glass number won\u2019t spill when wielded correctly, results in faster drink making \u201cand allows for a better free-pour, so it\u2019s easier to eyeball measurements,\u201d Krueger says. With a jigger of confidence, you too can master this pro skill. Here\u2019s how:\r\nSeal It\r\nPour your ingredients into the shaker\u2019s glass. Place the tin on top of the glass, so one side of both tin and glass are flush against each other. With the heel of your palm, firmly\u2014not too hard\u2014hit the end of the tin to form a tight seal.\r\n\r\n\r\n\r\n\r\n\r\nShake It\r\nWith one hand on the tin, the other gripping the glass, shake your cocktail in any direction, up down, or sideways. That fancy over-shoulder-shake? \u201cYou\u2019ll get style points,\u201d says Krueger, \u201cbut you can shake however you want.\u201d\r\n\r\n \r\n\r\n\r\n\r\n\r\nSmack It\r\nWith the glass upended in the tin, find the spot where the tin and glass seem to separate. With the heel of your hand, smack this sweet spot to break the seal. Strain the drink into your glass, sip and enjoy.