Durable plastic coffee filter cone with extension is the best method for making smooth, delicious coffee directly into a carafe or thermos. A portable pour over manual drip coffee maker (popularized by Melitta), the filter cone puts you in control. Put a paper cone filter in the cone, fill with ground coffee and pour over hot water. The extension makes it easy to brew right into your thermal carafe or thermos for transport or keeping hot for later use. Perfect for camping, boating and traveling.