don't drink that junk...just drink normal water.
It is tasty though
pure sugar...and 40 calories is nothing..you use up 40 calories by drinking, digesting, and peeing it out.
Water, Club Soda are the best thing. Get your vitamins from fruits and veggies and maybe even a multivitamin pill.
The "0" calorie Vitamin water has aspartame in it and that has potential for leading to a lot of health problems. Plus it tastes disgusting. If you are going to drink Vitamin water you might as well the drink the one that is 180 calories.
The problem with artificial sweetners is that they are sweeter than actual sugar. Your mind and body gets used to having sweeter things thereby causing you to be hungrier more often and eating more foods. Better off drinking the real thing sparingly...or better yet, diluting the vitamin water..
and on the case of Coke or Pepsi, I am against the diet crap...My recommendation would be that if you had to have it, mix 50/50 soda drink with club soda...