A handling trolley for at least one container (C) for its leakproof connection to an insulator via hermetically sealed connection, the connection being achieved by rotation of the container (C) relative to part of the insulator about an approximately vertical axis, the trolley (CH) comprising a support plate intended to support the container (C), structure enabling displacement of the trolley relative to the floor, structure for lifting the container in order to mate the container to the insulator, the first position indexing rod (26) on the trolley (CH) relative to the insulator intended to coincide with the second position indexing rod on the insulator, and angular orientation notch (24) on the container (C) relative to the trolley (CH) such that the container (C) is in a specified position relative to the insulator when the trolley (CH) is in a position determined by the correspondence between the first and second position indexing rods.