Abstract: A combination liner/insert (10) for segregating a top opening refrigerated container (30) such as a portable ice chest into a plurality of watertight compartments (26') and for protecting the interior of the ice chest (30) against damage caused by substances or articles placed therein. The liner/insert comprises a liner (22) having a base (14) and walls (12) dimensioned for being received within the ice chest (30) and a partition 16 for segregating the liner into watertight compartments (26') and a handle (18) incorporated into the partition (16).

Abstract: An apparatus for constructing an inexpensive and easily fabricated underdrain filter system is disclosed. The underdrain filter system of this invention includes a liquid impervious container having a horizontal support base and continuous sides. Adjustable support anchors are rigidly attached to the horizontal support base and in turn support a multiplicity of perforated plates. Perforated plates are located and securely attached to the anchor bolts such that the plates will form a plane which is parallel to said horizontal support base and which extends between the continuous sides. The support anchors are made of a material such as stainless steel which is impervious and substantially inert with respect to the liquid being filtered. In addition, the perforated plates are also inert with respect to the liquid being filtered, and may, for example, be made of a material such as polyvinyl chloride (PVC), stainless steel, copper, fiberglass, etc.