When mentioned storing electrons in a container as an electron bottle the difference is the idea of storing each electron not part of an atom inside the electron bottle. Compared to something like a capacitor or battery that store each electron in a more solid perhaps conductive material with each electron attached to an atom.
Also mentioned storing light in a container as a light bottle as perhaps another option.
Also mentioned other possibilities like since each electron don’t stop moving maybe like with zero point energy then can perhaps use that for generating energy like electric current / heat. Also other ideas with generating energy listed in this post. Also mentioned in this post perhaps with each electron able to attract gravity then perhaps if to move to make a gravity wave so maybe can be as a gravity thruster to use with propulsion / maybe as a warp drive.
If each electron do attach to the inner wall to accumulate then perhaps there can be more electrons that cannot easily attach due to the inner wall already having accumulated electrons. Which also maybe due to the inner wall having a negative charge can perhaps repel each electron as well.
Also perhaps a material that can repel magnetism maybe like a diamagnetic material maybe like a superconductor or something else like pyrolytic graphite or bismuth can repel each electron’s electromagnetism in turn repelling each electron. This maybe can prevent each electron from colliding with the inner wall.
Which I guess a superconductor have a much stronger diamagnetic effect than pyrolytic graphite and bismuth. Pyrolytic graphite I guess have a stronger diamagnetic effect than bismuth.