how much water before workout?

how much do you drink before a 1 hour workout when the indoor temp is (lets say) 70 deg.

I need about 1 bottle (12-16 oz) 30 min. before the workout.

unrelated sidenote: did you know "Evian" spelled backwards is naive.

I try to drink a little more h20 throughout the day of class and then have 1/2 a 16 oz bottle in the car on the way to class. if i go to 2 classes in a row, I drink the other half in the very short break between classes.