Diet Coke is so smart

I just finished up an 18-month NYC sabbatical in Arizona. While there I got seriously addicted to Diet Coke. I had a car and easy access to Sonic's famed 'pebble ice', and I could order it up with lime wedges, all under $2. So now back in NYC I am seriously trying not to drink as much. I'm drinking the 'baby cokes' - 7.5 ounce cans. Just maybe more than one. Or four.