- FOOD GRADE SILICONE, BPA Free - Freshware Silicone muffin cups are made of professional quality food-grade silicone, BPA free, safe to make various kinds of food. Stronger, more flexible and durable to maintain the original shape and non stick quality through more uses. Size: 2.8 x 1.8 inch top, 2.1 x 1.2 inch bottom, 1.1 inch depth. Volume: 12 x 2.2 oz, Total 26.4 oz. (TIPS: For better demoulding result, it is recommended to spray a little layer of butter first).