Technically, neither cone nor flat coffee filters are better. Each one is designed to work in a differently shaped basket, so finding one that works with your basket is the top priority. However, the filter shape can impact flavor. Cone-shaped filters usually produce more robust cups of coffee, while flat-bottomed filters create milder flavors. As a result, you may want to keep that in mind when choosing a coffee maker, ensuring you get one with the right shape basket.