Mint Caipirinha

Wash 19 fresh mint leaves, put them in the ice cube with soda water up to the line, and freeze it.  Cut 4 limes into pieces, crush them in a big glass with 4 spoonfuls of brown sugar, add 160 ml cachaça, mix well and distribute into 4 glasses. Add 4 or 6 ice cubes and fill the glasses with more soda water.