It's more reliable to store 150 gallons than expect to fill the Aquatank just before an emergency (earthquake?). Plus there's the eggs:basket issue - one container is prone to one leak, many containers not so much. If space is no object, consider smaller drums - 15 or 30 gallons, or both, along with some 3-5 gallon containers. At 8 lbs / gallon at least some of these are portable (in a car, anyway), even the 30 gallon containers with a hand truck. I have some 55 gallon drums filled, but they're not portable. Emergency Essentials has some good quality containers, all sizes.