Stasher Blue Topaz is a non-toxic, 100% pure platinum silicone bag which features a Pinch-loc™ seal and is endlessly reusable. Stasher is an eco-friendly and healthy alternative to plastic. Temperature resistant, Stasher can be stored in the fridge and freezer, or used in the oven or on the stovetop. Dishwasher and microwave safe, Stasher holds one healthy-sized sandwich or roughly 10 energy bars.