Q Drinks - Tonic Water Light - Case Of 6 - 4/7.5 FzOnly 20 calories. Fewer calories (q light tonic water has over 50% fewer calories than our q spectacular tonic water, which as 45 calories per 222 ml (which, by the way, ain't much). Non gmo project verified. Nongmoproject. org. Make your drink spectacular: q light tonic water is clean, crisp, and not too sweet, without the artificial taste of diet tonics made by the big guys. Make your favorite drink even better. I started q mixers after a warn