A refillable bottle for dispensing a fluid product including a body in which a container for packaging the product is formed, the bottle including a device for dispensing the packaged product, which is mounted in a sealed manner on the body, the bottle being equipped with a valve for refilling the container arranged to enable a product source to be placed in communication with the container in order to refill the latter, the valve including a passage for communication between the source and the container, the passage having a seat equipped with a valve element that is mobile with respect to the seat between a closed position and a open position, the valve element being arranged so as to be mobile between its closed and open positions under the effect of gravity by the positioning of the bottle in an upright position and in an overturned position, respectively.