Berry Caipirinha

Muddle the sugar and lime slices together in a shaker until it forms a syrupy texture. If the solution looks watery, add a little more sugar. Leave the lime slices intact. Add the berries into the mixture and muddle again until the berries have been crushed, but not pulverized. Add a generous amount of cachaça, add ice and shake well. Pour into a pint glass and serve.