Abstract: A filter for use in a container containing liquid and particles. The filter includes a cup that fits in the container. The cup includes a sidewall having in its bottom half material for filtering. The cup has a gasket around its top to create a seal between the cup and container. The filter may include a rod to insert and remove the cup, and the rod may be detachably attached to a positioning mechanism in the inside bottom of the cup. The rod may include a handle with an indicator surface for display of information. The cup with rod may be sized to fit within the container, and sized to allow for a cover over the container without interference.

Abstract: Filter apparatuses and methods for use in a container containing a liquid with particles. A filter apparatus may include a filter sized to fit within the container, and a gasket around the filter creating a seal between the filter and inside of the container. A rod may be used to insert the filter and gasket into the container. The filter and gasket and the inside of the container below the inserted filter and gasket define a variable space to contain the filtered particles. Use of the filter apparatuses allows for removal of the liquid from the container, but leaves the particles. The filter may be a flat or concave disc, or a cup.