Wristpocket requires an action to cast as a somatic spell with no verbal component. "You flick your wrist with a flourish, causing a single object that weighs no more than five pounds that you hold within your hand to vanish. The object is actually transported and stored within a small extradimensional pocket plane. The object remains there indefinitely until this cantrip is cast again, upon which it is immediately transported back into your grasp. You cannot store an object while one already occupies the extradimensional pocket."

Originally created by Matt Mercer as a Cantrip for Scanlan Shorthalt during the Critical Role first campaign