Great for weight conscious people, or children. When I buy my vegetables, such as carrots, bell peppers and such. I immediately wash and cut them up and put them into zip-lock bags in the refrigerator. When I want a snack, I will opt for them rather than sweets or chips.
And if you keep the veggies in those little green bags that I just "discovered" they will keep even longer. They are expensive to buy but can be reused over and over.