My recommendations:
I'm going to suggest that you buy a simple bottle of sparkling mineral water so that you get the nutritional benefits of the minerals (calcium, magnesium), then squeeze a lemon into it.
That way you cut out the sugar and you also get some pure vitamin C, potassium and B6.
And the average lemon gives you about five to six teaspoons of juice, so you'll get a lot of flavour with that.
This way you'll not only get a refreshing drink, but it will also be very low-calorie, sugar-free and good for you.
And if you really need a bit of alcohol, a splash of vodka goes very well at the last minute.
Highlights:
• Natural colour but not flavour
• Three teaspoons of sugar
• Two teaspoons of lemon juice per 250ml glass.