Touted as the kitchen material of the future, silicone is like the Pyrex for the 21st century. Highly heat resistant, non-stick, easy to clean, easy to grip, flexible, and odor and stain resistant, silicone has found its way into almost every part of the kitchen, from bakeware to garlic peelers. But if worries about safety or stability, or just an unease with the notion of trusting your muffins to...