Alchemist's Retrieval

You attempt to pull a geist or other ethereal creature into a flask to contain it. You choose one creature you can see within range that has the Incorporeal Movement trait. That creature must succeed on a Strength saving throw or be pulled into the flask and trapped.

While trapped, a creature is incapacitated, has full cover from attacks and other effects originating outside the flask, and can't see or hear anything outside the flask. At the end of each of its turns, it can repeat the Strength saving throw, escaping the flask on a success.

Breaking the flask ends the spell early. If you concentrate on this spell for the entire possible duration, the trapped creature remains trapped in the flask until the flask is broken.