Methods, systems and kits are disclosed for devices suitable for use in the treatment of obesity in patients, either human or animal. The devices comprise an inflatable balloon having a proximal end and a distal end, the inflatable balloon further comprising an interior chamber adapted and configured to receive a filling material; a port in communication with the interior chamber of the inflatable balloon. The inflatable balloon can further be adapted and configured to achieve a deployment shape at least partially conformable to an interior dimensional shape of a stomach of the patient and further wherein the inflatable balloon is adapted and configured to have a distal diameter less than or equal to a proximal diameter.