In a cocktail shaker or mason jar with tight fitting lid, add pineapple chunks, mint, lime juice and agave or honey. Using a wooden spoon handle, muddle the pineapple and mint together until the pineapple breaks up and the mint breaks down.
Add pineapple juice, tequila. Shake to combine.
Divide Mixture between to glasses filled with ice. Top with 1 ½ oz soda water each. Garnish with mint and/or pineapple if desired.
