The Ratio Flat Bottom Paper Filters bring consistency and style to your coffee brewing. Who knew paper filters had such an effect on your coffee’s overall taste? We did, and so did Ratio. These filters are made of laboratory-grade paper and are made of 100% virgin wood pulp.
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Ratio designed their Flat Bottom Paper Filters to extract the full potential from your ground coffee. Made with laboratory-grade paper that is 100% virgin wood pulp, these filters boast consistent and precise flow-through. Their bottom width measures 3.5in, their top edge a 2.25in height and 5.75in width. Reviewers are quick to note that the paper doesn’t carry a flavor, which may mean you can skip the pre-wetting stage (though make sure to test that yourself beforehand if your preferences are different!).
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