Combine cranberries and 1 cup of water in a blender and process until the cranberries are reduced to a puree.

Place a strainer over a bowl or a 4-cup measuring cup.

Pour the mixture into the strainer, pressing the pulp with a spoon. Pour the remaining cup of water into the strainer and press the pulp again, until all of the juice is extracted. Save any remaining pulp for adding to muffins or smoothies.

Add sugar to the cranberry juice and whisk until it’s fully dissolved.

Pour into a 1-litre jar, cover and refrigerate. Shake before serving. Will keep for up to one month, but you will drink it long before that.