Add lime juice, pineapple juice, vodka and grenadine.
Strain into highball glasses or mason jars filled with ice.
Serve each with a wheel lime slice
Notes
* Before squeezing the limes, heat them in a microwave for about 30 seconds and then rub them back and forth on the counter top. This easy two-step process results in more juice per piece of fruit. * You can substitute gin for vodka if that's your preference * Use non-wheat vodka to make this gluten-free