Good guess—many survival guides recommend drinking a gallon of water each day when hiking or working outdoors. But that's more water than you need to drink in space—and every pound matters, so try again!

1 cup (.5 lbs/.27 kg)	2 quarts (4 lbs/1.8 kg)
10 gallons, freeze-dried (1 ounce/27 grams)

© The Children's Museum of Indianapolis, 1999