Chokotto Grill Baby Castella Maker - Power: 500W - Hole Size: Approximately 35mm in diameter - Maximum Cooking Capacity: 8 pieces - Usage: Confectionery making I personally don't see any noticeable stains, but those who are particular about details might be concerned, so please refrain from purchasing if you are looking for perfection. Returns and refunds are not accepted. Thank you for your understanding.