How long does it take for a taco to go bad?

Monday was a good mail day here... We opened our door to discover a care package from our good friend Steve York. He sent us some essentials from the states that we can't get here... tons of Fun Dip, Muffin Mixes, and some of his sermons on tape... Really nice of him right? Well... this is where the story gets bad... Steve caringly wrapped each and every item in Taco Bell wrappers... oh.... just the sight of those familiar wax papers made my heart skip a beat... I tried licking them to see if there was taco or burrito essence left on them... but alas... Steve had made a special trip to Taco Bell and had gotten dozens of new wrappers just for our package... Thanks for the thought Steve...