Flat Bottom Filter — A little coarser grind than a cone shape filter. The flat bottom filter is the most common grind for a drip coffee machine. French Press — Coarse grind used for a French Press or bistro.

What is flat bottom coffee?

Flat Bottom Filters In a flat bottom filter, the water runs through the coffee grounds faster. The cone shape of this filter causes the water to collect in a central location, which provides even saturation. Depending on the coffee brewer, the sprout may sometimes not saturate all the coffee grounds evenly.

What is the best grind for Keurig?

A medium to medium fine coffee grind is the most popular option for Keurig owners. Many brands of coffee offer this coffee grind, or you can grind it yourself. A medium to medium fine grind will be somewhat thin in texture and gritty like sand. This allows the water to flow rapidly through the coffee grounds.