What’s not!? Silicone is a miracle product in that it’s non-porous, non-toxic, contains no BPA and can withstand temperatures from -80̊ F to 450̊ F. While you can put a Silipint in an oven, boil water in it, and microwave the heck out of it, you should not put Silipints on direct flames, a burner, or try to broil them. It’s flexible, packable, and light; you can freeze it; nuke it; throw it through the dishwasher. Plus, since our silicone products are unbreakable and reusable, our Mother Earth loves them too. Furthermore, silicone is derived from abundant, easily accessible elements (no petroleum products that need to be drilled for).