Abstract: A personal hydration system for use by military personnel in environments containing nuclear, biological and chemical agents. This system includes a bladder, a neck, a cap having an outlet port and a hose with a connector. The bladder has no sharp or small radius internal corners and may be turned inside out through an oversized fill port to ensure complete cleaning. The cap is sealed by a primary seal, wherein a thicker portion of the bladder is trapped between the cap and the neck, and a secondary seal, wherein seals are squeezed between the neck and the bladder's interior. The cap includes an outlet port, thereby decreasing the possible exposure sites. The connector is adapted so that it may attach itself to various other equipment, such as gas masks or mouthpieces. A user wearing thick gloves will be capable of operating the entire system, including the cap and the connectors.