* Permanent coffee filter holder size 4 made of bio-based plastic * This permanent filter holder is washable and reusable indefinitely * Biobased plastic * Can be put in the dishwasher Made of biobased plastic that takes care of the planet, this coffee filter holder will allow you to make excellent coffees very easily. Put a permanent filter on it and you won't have to worry about buying paper filters anymore. It will fit perfectly into your coffee maker