A windshield washer fluid supplying system for a vehicle having a windshield washer device comprising a reservoir mounted in the vehicle for storing washer fluid is disclosed, the supplying system comprising a supplying tube having a first end portion and a second end portion; a first end piece comprising a portion mountable on the reservoir and an aperture therethrough for receiving the first end portion of the supplying tube so as to enable fluid communication between the first end portion of the supplying tube and the reservoir; and a second end piece comprising a portion adapted for mounting on a container of washer fluid placed in the vehicle and an aperture therethrough for receiving the second end portion of the supplying tube so that the second end portion of the supplying tube extends inside the container proximate a bottom portion thereof when the second end piece is mounted on the container, thereby establishing a siphonage circuit between the reservoir and the container with the supplying tube for enabling distribution of the washer fluid from the container to the reservoir.