A beverage preparation capsule (200) is provided comprising a hollow body suitable for containing a beverage preparation ingredient, the hollow body having a top end for receiving liquid into the hollow body, a bottom end for dispensing the beverage from the hollow body, and at least one side wall (210,212) between the top and bottom ends, the bottom end being in fluid communication with the top end; and a sheet of filter material (230) extending from a first position on a side wall (210) to a second position on a side wall (212), wherein said first position is relatively closer to the top end of the hollow body and the second position is relatively closer to the bottom end of the hollow body, such that the sheet of filter material (230) extends across the inside of the hollow body at an incline relative to the side wall. The beverage preparation capsule may be used with a beverage preparation apparatus in a method of preparing a beverage, particularly ground coffee or leaf tea.