The Vancouver Indy Coffee Scene

A bottomless, or naked, porta-filter is similar to a regular porta-filter but with the bottom removed to expose the screened basket.

A large quantity of particles from the grinds suspended in the beverage.

Author’s note:
This usually results from using a grind that is too fine for the filter type. While a paper filter will usually hold what ever grind you use. Metal filters that are perforated will not hold a improper sized grind, which will result in muddy taste.