Bacta tanks were large vessels filled with a liquid healing agent and used to treat seriously injured patients. To promote healing, patients were completely submerged and used breathing masks while recuperating. Clone troopers were treated in bacta at facilities such as the Kaliida Shoals Medical Center. After he was injured by a wampa, Luke Skywalker recovered in a bacta tank at Hoth’s Echo Base. And after claiming the throne of Jabba the Hutt, Boba Fett recuperated in a bacta pod.