What are those things that you put into coffee pots called?

They come in various materials:

* Paper filters: These are the most common type and are usually disposable.

* Cloth filters: These are reusable and often made of cotton or linen.

* Metal filters: These are also reusable and come in mesh or permanent filter styles.

* Ceramic filters: These are typically used in pour-over coffee makers and are known for their ability to filter out even the finest particles.

Let me know if you have any other questions!