The present invention concerns a retractable covering system suitable for covering a handling element protruding from the neck of a product reservoir. In the system, an assembly ring defines a longitudinal axis and an axial direction. A cap is translatable along the longitudinal axis relative to the assembly ring between a deployed position, in which it extends substantially protruding relative to the ring, and a retracted position, in which it is at least partially retracted relative to the ring. An elastic element biasing biases the cap toward the deployed position and a reversible locking device locks the cap in the retracted position.