Uses #4 cone coffee filters High-quality porcelain with white gloss finish Top-rack dishwasher safe A medium-size drip opening provides a consistent brew and eliminates risk of bitterness. A ring underneath drip opening that directs coffee flow into mug and prevents runoff. Full-height ridges within cone provide optimal flavor extraction. Two viewing holes prevent overflow. Includes a starter pack of #4 Melitta cone coffee filters.