Whip up refreshingly fruity homemade fizzy drink.
Cut the ends off the mandarins and the lemon and cut into wedges about 2 cm wide on the skin side, keeping the skin on.
Place the mandarins, sugar and the still water into a blender or food processor, and blitz until the sumo mandarins and the lemon are pureed.
Sieve twice through a fine sieve. Put away in the fridge to chill. The mix will last roughly 3 days.
To serve, add the remaining water and pour into tumblers filled with ice.
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