S.G.
It really doesn't take any more water to wash 50 dishes as opposed to 5 dishes. You are washing dinner dishes anyway, aren't you? It is the same sink full of water or dishwasher load. I also use the bread bags for sandwiches, and then reuse them again for diaper disposal bags at work. A plastic container with pretzels or Goldfish will not need to be washed daily, you can just refill it with more of the same. Not only is washing and reusing containers more environmentally responsible, but it is much more economical that using disposables or single serve.