How the Orbera® Weight Loss System Works Orbera® is a weight loss balloon designed to help with portion control and improve weight loss. While it is temporarily in your stomach for six months, it encourages your body to adapt to healthier portion sizes. The shape and volume of the stomach balloon takes up enough space in your stomach to help you adapt to healthier portion sizes and has been shown to help patients lose up to 3x the weight of diet and exercise alone.