How is it giving up soda, if you replace it with soda water/citrus drink? I am a little confused. I guess your reduced your soda intake mostly by replacing it with green tea though.
IME, consistently, for my while life in the US, “Soda” (standalone) is (in general use, there are contexts where it means something else) a carbonated and flavored soft drink, whether or not it is sugared, while “soda water” is carbonated water without additional flavor.
soda water/sparkling water like perrier, etc. Just water CO2 and some fruit juice, 0 calories.
zero soda(coke/pepsi/mt dew) intake, now just bottled water, carbonated water/fruit juice and green tea if you need a boost.