A belay device for a rope, comprising a plate having at least one slot for a loop of the rope to pass through, a retaining element integral to the plate, and a carabiner connected to the retaining element by means of a securing part rendering it captive with respect to the plate. To achieve this object, the toner container includes a resin molded article having a heat-insulating layer in it. These compositions are useful in the deposition of thin films, such as by atomic layer deposition. A switching andor shut-off device is provided, by which the cooling unit can be switched off andor can be uncoupled from the passive cooling system formed by the internal and external heat exchangers and by the storage tank.