Here is info from an article I was reading regarding caffine intake. This info is from the magazine Today's Parent, Pregnancy and Birth.
According to Health Canada preganant women should limit their caffine intake to less than 300 mg a day.
The following is a list of the approximate caffine content of drinks.
Brewed Coffee
grande, large or 16 oz 270 mg caffine
tall, medium or 12 oz 203 mg
regular or 8 oz 135 mg
Energy Drinks*
16 oz monster can 160 mg
11.9 oz can 120 mg
8.3 oz can 80 mg
Tea
8 oz 42 mg
Cola Drinks
1 can/ 355ml/12 oz 42 mg
*Keep in mind these drinks can get the energy boost from herbs such as guarana or yerba mate which act like caffeine. But you wont see caffeine on the label unless they add pure caffeine.
Now keep in mind, if it worked, I drank it. I just found that seeing the numbers really helped. That is about 7 cans of pop!
Hope that helps.