A piddle bag (formally known as a Piddle Pack) is a specialized, portable urinary device used by pilots—most notably fighter pilots—to relieve themselves during long missions where they cannot leave their seats. These are not just simple bags; they are filled with highly absorbent polymer beads that instantly turn liquid urine into a leak-proof gel. This is critical for safety, as any spilled liquid could cause an electrical short in the cockpit's sensitive avionics. The bags are designed to be used with one hand and are often integrated with the pilot's flight suit, which features dual zippers for easy access. In 2026, advanced versions of these systems, including vacuum-assisted devices for both male and female pilots (like the "Skydrate" system), have become more common to improve pilot comfort and reduce the risk of dehydration during multi-hour combat or ferry flights.