The Isis jar was a Goa'uld Stasis jar in which Isis was imprisoned by Setesh. It was discovered along with the Osiris jar, and was later recovered from a shipwreck and taken to be studied by Dr. David Jordan. It was later scrutinized by the S.G.C. when it was brought there by Dr. Daniel Jackson. When probed, the Goa'uld Isis was discovered inside, albeit dead, as the seal had been broken during transport from the shipwreck. (SG1: "The Curse")