Our Mission JarJackets was created with a simple mission to find better more creative ways to put the time-tested mason jar to work. Why do we feel so strongly that mason jars are a better choice than plastic? It’s simple really Better For Your Health Choosing mason jars allows you to sip colder and more pure-tasting water. Because they are made of glass, they also don’t leach harmful chemicals like BPA/BPS and phthalates into your food. Just like glass, our reusable FDA grade silicone jackets are 100% non-toxic, plastic-free, waste-free, BPA/BPS-free and phthalate-free.