Urine drainage bags are, simply stated, storage bags that collect urine for individuals who cannot urinate on their own. They are typically used with catheter supplies such as Foley catheters, external catheters (condom catheters), urostomy pouches, or nephrostomy tubes. The urine drainage bag attaches to the urinary device with flexible tubing. Drainage bags are then emptied as needed into the toilet or another receptacle.