Whisk together the hot water and matcha powder until smooth. Let cool.
Add the sugar and mint leaves to a cocktail shaker and muddle together. Squeeze the juice of the lime into the shaker and empty the cbdMD CALM capsules in there as well. Add the matcha and fill the shaker with ice. Shake for 30 seconds.
Fill two cocktail glasses with crushed ice, strain the match mix into the glasses, top off with sparkling water and garnish with lime slices and mint sprigs.