Vessel locking system

A releasable locking cap, comprising:

• a) a plug having a thickness disposed between a top surface and a bottom surface and bounded by a side surface, said side surface configured to allow removable insertion in an inlet of a vessel;
• b) at least one lock member bore which extends a distance inwardly from said side surface;
• c) at least one lock member slidably engaged within said at least one lock member bore having a length disposed between a first end and a second end;
• d) at least one lock member magnet directly connected to said at least one lock member;
• e) a magnetic field which repulses said at least one lock member magnet to generate travel of said at least one lock member within said at least one lock member bore to extend said first end of said at least one lock member beyond said side surface to allow lockable engagement of said first end with a portion of said vessel.