A fillable bottle for dispensing a fluid product provided with a relief valve for filling the reservoir and putting a source of product into communication with the reservoir for filling, the relief valve including a passage for communication between the source and the reservoir, the passage having a seat provided with a valve which is mobile relative to the seat between a sealed closed position and an open position of the passage, the valve being mobile between its closed and open positions under the effect of the gravity induced by the positioning of the bottle respectively in an upright position and in a turned-over position, the bottle including at least one bell in the reservoir, the bell being in communication with the reservoir in the upright position and isolated from the reservoir in the turned-over position in order to not be filled by the product coming from the source.