Keurig My K-Cup Universal Reusable Coffee Filter, MultiStream Technology

Most Keurig home brewers, including the K-Supreme sold here, plus K-Elite, K-Classic, K-Duo, K-Cafe, K-Select, and K-Mini Plus.

It does not fit the K-Brew + Chill, the K-Mini Mate, or the K-Crema. Older Keurig commercial brewers are also out.

A medium drip grind. Espresso-fine grounds pack down and choke the mesh, which gives a slow, bitter cup and can trip a needle error.

Coarse grind runs through too fast and tastes watery.

Fill to the moulded MAX line, roughly two tablespoons, which suits a 6 to 8 oz cup.

For a 10 or 12 oz setting expect a lighter cup; the basket cannot hold enough grounds to keep a large brew strong.

On most current brewers the filter drops straight into the existing pod holder. Some older models have a separate K-Cup holder that lifts out first.

Either way, nothing is cut or modified, and the machine goes back to pods whenever you want.

Keurig only rates it for ground coffee. Loose tea leaves swell past the mesh, and cocoa or other powders clump and clog the needle path.