Beyond Gourmet Unbleached Coffee Filter - 100 per pack - 6 packs per case.

Half the time I use these coffee filters the bottom pops open, causing all of the coffee grounds to drop into my cup. It happens 3 out of 4 times, and is SO frustrating because it is a waste of my coffee and time. I don't put an exorbitant amount of coffee grounds in the filter (about a tablespoon or less) so it isn't an issue of overloading the filter. If you're looking for a coffee filter for pour over coffee - look elsewhere.