A nurse at Mayo Clinic Rochester is the one who suggested body temp tap water ememas for my J-Pouch emptying problems. She said I could do as many a day as I feel I need without harm. I am currently doing about 4 a day using an empty Fleets bottle. I cannot use the saline solution that comes in them, it stings like crazy if I have any skin irritation. Like Jan said, the tip unscrews easily for reuse. I wash the bottle and cap exterior with hot tap water and hand soap after use, and fill it with hot tap water to rinse out the tip, then let it air dry. Been doing this for about a year. A bottle lasts for many uses before any discoloration at the white tip. My pouch is 20 years old and this is the only way I get relief from the constant urge to empty. It is so simple and helps so much.