1.NINJA REBLE COFFEE FILTER COMPATIBLE WITH K eurig Ninja Dual Brew Coffee Maker : Ninja CFP201 CFP301 Dual Brew Pro Machine. 2.: Reusable ninja k cups filters are made of superior quality stainless steel micro-mesh which is engineered to ensure an optimum flow rate of water through the coffee, preserving the coffee natural oils and flavors entirely. 3. and Save Your Money: The refillable k cup is made of high quality stainless steel . Compared to plastic coffee pods or paper filters, this stainless steel coffee pod is more environmentally friendly, helping to reduce expensive environmental waste caused by disposable products, while reusable capsules are very durable and can be used many times. 4. and Clean: Reusable K CUP are very easy to use, just fill the coffee grounds you need into the pod, after using, just dump the grounds into the trash and wash the reusable K CUP filter by water. Also these refillable single K CUP are for dishwasher.