These urinals have a specially designed spout that prevents spilling and leaking once urine is in the storage container. Autoclave at 250 degrees F (122 degrees C). Urinals hold 500cc liquid. Works best when used in a sitting position. Perfect for bedside use. May be hung on a walker for portability. Complete instructions are included. Urinals are available in men's or women's regular or clear models. Replacement O-ring gaskets are sold separately in a package of 6.