Abstract: Disposable collection devices for human waste formed substantially of light weight, flexible polymeric sheets, are designed to slidingly fit over a standard, open ring toilet seat, most preferably forming an envelope which receives the toilet seat between upper and lower portions. A collection portion is disposed between portions of the envelope such that when the device is positioned on a toilet seat, the collection portion will extend downwardly permitting collection of human urine and/or feces from a patient. The collection portion preferably extends downwardly sufficiently to avoid splashing or other unnecessary contact between the patient and the waste being collected. Embodiments of the present invention advantageously comprise at least one removable collection portion. Embodiments of the present invention also comprise structures for substantially closing the collection portion after the waste has been deposited therein.