A sterile spigot catheter is a small, plug-like device inserted into a urinary catheter to temporarily stop the flow of urine for hygiene and collection purposes. It is a single-use, sterile item that seals the catheter for a short period, allowing urine to collect in the bladder for later drainage, or simply for a period of no output. 

Function: It plugs the end of a catheter to prevent urine from flowing out.

Purpose: It is used for hygiene, to allow urine to be collected in the bladder for a short time, or for a brief period without drainage.

Sterility: It comes in sterile packaging for medical use and is designed to prevent contamination.

Usage: It is a disposable item, meaning it is used once and then discarded