Liquid filtering bag

A liquid filter convertible between a bag configuration and a flat sheet configuration comprising:

• a single unitary filter sheet comprising a liquid-permeable fabric having a first side disposed opposite a second side and a bottom portion disposed opposite a top portion, a notch extending toward the top portion at an innermost center of the bottom portion;
• a zipper including:
• a zipper slider and a puller;
• a first set of teeth attached to the perimeter of the single unitary filter sheet beginning at the notch, extending along the bottom portion, and along the first side of the single unitary filter sheet substantially to the top portion;
• a second set of teeth attached to the perimeter of the single unitary filter sheet beginning at the notch, extending along the bottom portion, and along the second side of the single unitary filter sheet substantially to the top portion;
• wherein, the liquid filter is convertible between:
• a flat state where the first and second sets of teeth are fully disengaged or unzippered;
• and
• a bag state where the first and second sets of teeth are fully engaged or zippered, and the single unitary filter sheet defines a substantially cylindrical cavity, closed by the engaged first and second sets of teeth at the bottom, and defining an open-top having a diameter substantially equal to the diameter of the substantially cylindrical cavity, and wherein the bag state has a height from a lower edge of the bottom to the open-top that is in a range of 200 to 900 millimeters, a width that is in a range of 100 to 500 millimeters, and a height to width ratio in a range of 1.5 to 3.