It can be used for muffins!Silicone bakeware is both dishwasher and microwave safe and can be used in the oven or the freezer. They are extremely heat resistant, naturally non-stick and easy to clean, and flexible. Silicone bakeware does not absorb or retain odors or flavors, and usually only takes a few minutes to cool once removed from the oven. Heat/Cold Resistance - our silicone bakeware items are FDA and ROHS approved and temperature safe from -40° to 230°C/450°F, making it ideal for both oven and freezer! Easy To Clean - no more soaking or scrubbing baking pans - just wash and wipe! Versatility - 1 product can be used in oven, microwave, dishwasher and freezer! Flexibility - bendable, or even foldable - save storage space! Long Lasting - no ruined pans from accidental scratches and dents, and no rust! Saves Energy - heats up and cools down extremely quickly - reduce cooking times!