There are bottled seltzers and there are bottled seltzers. Kinley (made by Coca Cola) is tasty, and/but has ingredients other than CO2 and H2O. For a more "authentic" -- i.e., bland -- taste, try Tempo's soda water. Not being from NY, I can't testify as to its eggcreamness.
Birthdays are nature’s way of telling us to eat more cake. --