A non-bioabsorbable tube intended to be endoscopically implanted transmurally between the gastrointestinal (GI) tract and a pancreatic pseudocyst or the biliary tract for drainage. It is a flanged stent-like structure made of metal which is covered/lined with a synthetic polymer material (e.g., silicone). It is typically expanded in situ (e.g., with a balloon catheter or self-expands) and disposable devices to assist implantation, with or without electrosurgical functionality, may be included with the device.