Glycerin: the long-shelf-life compound most people overlook. Why stock it? Here’s how it’s surprisingly useful: Doesn’t freeze, lasts indefinitely when stored properly Moisture-retainer for homemade balms, lotions, and even soap to prevent cracking Creates alcohol-free herbal tinctures Acts as an antifreeze solution Leather conditioner and rust prevention for tools Mixed with baking soda, it becomes a DIY toothpaste And yes, it’s reactive—can ignite with the right oxidizer, like potassium perman