The Desert Patrol is a rugged short-term water storage vessel based on the design of a traditional plastic jerry can. Choose the 6-gallon if you need more water at camp. If you find your 6-gallon jug to be too cumbersome to haul or too heavy to lift, then you'll appreciate the smaller 3-gallon size. It's "just right" for keeping hydrated and cooking at camp.
NOTE: Prolonged exposure to direct sunlight will cause the water container to degrade and become brittle, increasing the chance of leaks. It is highly recommended to store water containers in cool shaded areas.