Good topic-question. I normally save (all) my bottles (any reclaimable/reuseable containers) not just the E-liquid bottles. So, they can be re-used for cooking/food storage, canning, kitchen/culinary herbal preparations, vint mead or brewing ale. To ensure purity & no contaminations of the final recipe-results. I always sanitize the bottles. One product I suggest, while add in the "spam" disclaimer is a good sanitizer-rinse, easy to use, costs very lil, and keeps in dry storage for quite some time. "One Step" is the product's name here is a link to just one site online. It is an excellent product, never had a batch of mead, ale, and more go bad with mold/mildew/fungi/bacteria from it's proper use. Enjoy. A lil bit goes a long way when following the directions correctly.. Also, again this only applies to the bottles (glass or plastic) not to any metal/electric parts.
http://www.amazon.com/One-Step-8-oz/dp/B0064O7VYY/ref=sr_1_1?ie=UTF8&qid=1368260463&sr=8-1&keywords=One+step