B65D 51/2821

Closures not otherwise provided for combined {or co-operating} with auxiliary devices for non-closing purposes with auxiliary containers for additional articles or materials {the closure presenting means for placing the additional articles or materials in contact with the main contents by acting on a part of the closure without removing the closure, e.g. by pushing down, pulling up, rotating or turning a part of the closure, or upon initial opening of the container the additional article or materials being released by piercing, cutting or tearing an element enclosing it said element being a blister, a capsule or like sealed container}