really cheap plastic barrels for water storage? I'm talking about the white ones with the full lids, like apple juice comes in at the hospitals and such. I need about 6 of them for rainwater storage before summertime comes along. I just know that if I store rainwater, I won't need it; but if I don't, I will. I want to be sure I have enough water to make a good strong showing with my first garden. Super cheap is good, free is even better. Any suggestions?