You've got more than one shot to get this drink right, but why not do it properly the first time around? There's some serious prep time to this tequila concoction -- so allow yourself a week or so.
For 1 people
In a large, decorative jar, combine the pineapple chunks and tequila. Add the sugar and vanilla beans. Cover and let the tequila stand, for at least 1 week, at room temperature, stirring it occasionally.