What exactly does 200 Calories mean?
One calorie is a measurement of heat that it takes to raise 1 gram of water 1 degree Celcius at 1 atmospheric pressure. A "Calorie" with a capital "C" is a kilocalorie... and the unit that we usually refer to in our diets. So, 200 Calories raise 200 kg of water 1 degree celcius.
That's a fun fact for trivia geeks, but nearly meaningless to people who are trying to diet.
Here's a website that shows you what exactly 200 Calories look like.