These come in some amazingly small sizes. Virtually all modern electronic devices contain many if not hundreds of these handy gadgets. Without these most electronic gadgets would not be possible. Capacitors in automobile ignition systems are still often called condensors. A charge can be placed on an object by anything that can generate electricity.
All electronic circuits shuffle charge around from one circuit to another with wires.
If the object is non-metal, you can stick on a piece of metal to the object somewhere, and then charge up the metal. The object will absorb some of the charge from the wire, even though the object does not conduct electricity well. Some other examples When you walk across a carpet on a dry day, you accumulate a static charge. The charge comes from friction between your shoes and the carpet. But if your body had no capacitance, you could not accumulate the charge.