A capacitor (1) for application in high pressure environments has at least two electrodes (2.1, 2.2) and at least one electrically insulating film (5) forming a dielectric between the electrodes (2.1, 2.2), each electrode (2.1, 2.2) having at least one metallic foil (3.1, 3.2) or at least one metallic layer on the electrically insulating film (5), wherein the capacitor (1) is unencapsulated and designed to allow a surrounding liquid to fill cavities of the capacitor (1). Furthermore, an electric device has at least one such capacitor (1) in a device housing, whereby the device housing is filled with an electrically insulating liquid.