Combination of a row of containers and a strip of caps, each of the containers and caps being respectively joined by breakable links allowing the joined strip of caps to be placed on necks of the joined row of containers by a translational movement parallel to axes of the containers. Click-fasteners are provided on the container necks to interact with complementary click-fasteners formed on the caps. The caps close the containers in a leaktight fashion when snapped into place. The links between each container/cap combination can then be broken to separate each container/cap assembly from the other container/cap assemblies. The click-fasteners also allow each cap to be removed from the corresponding container.