Chlorine-based sanitizers in particular are not generally okay for reuse, because chlorine evaporates constantly. Not that that'd be a problem while stored in an airtight container, but it would get progressively less effective each time it was used.
As Brad said, starsan is great for the task. I store and reuse starsan for months at a time. As long as it stays clear and the pH is below 3.0, it's still good. Despite its somewhat higher initial cost than some other sanitizers, if you're willing to store and reuse, starsan can easily be one of the cheapest sanitizers of all, in addition to being really convenient and effective.