I was watching one of Mathas' videos of PZ, and he was suggesting that perfect, water-tight rain barrels should not be available to build at level 0. I agree, but then I thought, why would rain barrels even be necessary? Just drag over a wheely bin and pop the top open. Of course, to balance it, you could make it so that you have a pretty high chance to get sick from the garbage water unless you perform a "clean" interaction that consumes 1 sheet or 1 bath towel, and 1 jug of bleach. Perhaps to balance this out bleach could be made slightly less common.
