A gastric balloon is a non-surgical, non-pharmaceutical tool used in the treatment of obesity. The gastric balloon system is made up of a soft, expandable balloon, a placement tube, and a filling system. The deflated balloon is inserted orally and moved into the stomach, where it is then filled with saline. Once filled, it floats freely in the stomach, limiting the amount of food needed for a person to feel full. Along with a supervised diet, the gastric balloon can help an obese patient lose weight. The balloon is temporary and usually removed after six months to a year.