FIELD: packing and sealing. SUBSTANCE: invention relates to devices designed for sealing by caps vessels with medicines, drinks or perfumes. Said cap has audio message playback unit arranged in body, loudspeaker with power source and switch for switching on audio message playback unit. Cap has additional switch in body. Additional switch is made for changing over at application of external force and it is connected between one of buses of power source and check inlet of audio message playback unit. Said unit is made for reproducing reference audio message when additional switch is changed over with cap fitted on. EFFECT: enlarged operating capabilities of cap. 15 cl, 6 dwg
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