The present invention relates to a tamper resistant lid (10) for a container (1). The lid (10) exhibits a centre axis (X) and comprises an outer and an inner member (20, 40). The outer and inner members (20, 40) are further adapted to be substantially prevented from displacement along the centre axis (X) with respect to each other. At least a part of the inner member (40) comprises threads (48) enabling a threaded connection to the container (1) by means of rotating the outer member (20) in a first direction. The lid (10) further comprises at least one stop member (51, 52, 53, 60) preventing the inner member (40) from rotation with respect to the outer member (20). The at least one stop member (51, 52, 53, 60) is adapted to be controllably disabled with a designated force after said inner member (40) has been connected to the container (1), so that the outer member (20) can be freely rotated with respect to the inner member (40) to thereby prevent removal of the lid from the container (1). The present invention enables the sealing of a container, while substantially preventing the container from being reopened.
