with reference to the drawings , a container according to the invention , generally indicated 1 , comprises a first half - shell and a second half - shell 2 , 4 , generally made of injection - moulded or thermoformed plastics material . although , in the drawings , the two half - shells have a configuration generally corresponding to that illustrated in wo93 / 00267 , in which each half - shell has a rounded , dome - shaped end portion and an adjacent , generally cylindrical skirt portion , the constructional principle of the invention is intended to be applicable to half - shells of different configurations . the two half - shells can be coupled mouth to mouth by mutual engagement means constituted , for example , by a collar 6 which is carried by one of the half - shells and which can engage the mouth portion 8 of the other half - shell . to promote a firm connection between the two half - shells , form - fit or snap - engagement means are provided and are constituted , for example , by an annular rib 10 which engages a corresponding annular groove ( not visible in the drawings ) formed on the internal wall of the mouth portion of the other half - shell . it is intended that other engagement means may be used , provided that they are suitable for ensuring a connection which is firm but which can be released easily by the user . according to the principal characteristic of the invention , connection means are associated with each of the two half - shells and can engage one another in order to keep the two half - shells connected to one another even when the container is in the open configuration . preferably , when the connection means are in mutual engagement , they are arranged and configured in a manner such as to permit a movement , with limited travel , of one half - shell relative to the other in a direction perpendicular to the plane of the mouth . moreover , in their mutual engagement position , the connection means preferably perform the function of articulating one half - shell to the other so as to permit an opening pivoting movement of one half - shell relative to the other . in particular , the connection means may form a buckle - type connection with a male element 12 or 14 and a female element 16 or 18 which are capable of a mutual form - fit , snap - engagement , or friction coupling and which are integral with the half - shells 2 and 4 , respectively . in one embodiment , the connection means comprise a male element 12 which is integral with the half - shell 2 and which extends from the periphery of the mouth of that half - shell and a female element 16 which is integral with the other half - shell 4 . the male element 12 , which is made of flexible and resilient plastics material , is preferably articulated to the body of the half - shell 2 by a film hinge 20 and has a generally anchor - like configuration with anchoring ends 22 a , 22 b which are bent at an acute angle . the female element 16 is defined by a bridge - like wall 26 which is integral with the half - shell 4 and which extends adjacent the collar 6 so as to delimit a cavity 24 which is open at its longitudinal ends . the anchor - like element 12 can be fitted in the cavity 24 as a result of resilient deformation of the bent ends 22 a and 22 b which , after their insertion , can engage the side walls 28 and 30 of the cavity 24 by returning resiliently . preferably , as shown in fig1 and 2 , the male element is formed by a pair of parallel prongs 22 separated by a longitudinal slot 32 and each having an anchoring end 22 a or 22 b . correspondingly , the female element 16 comprises inside the cavity 24 , a guide rib 34 and a pair of projections or teeth 36 and 38 projecting from the side walls 28 and 30 , respectively . in this preferred embodiment , the male element can be fitted in the female element with the guide rib 34 engaging the slot 32 ; when the male element 12 is fitted in the female element , the projections 36 and 38 act as locking elements which engage the ends 22 a and 22 b so that removal of the male element from the female element and separation of the two half - shells thus connected are prevented . in any case , the connection is such that the male element 12 is movable inside the cavity 24 , parallel to the rib 34 , until the ends 22 a and 22 b engage the projections 36 and 38 ; it will be appreciated that this capability for movement in a direction perpendicular to the plane of the mouth facilitates the opening of the container from its closed configuration . in the embodiment of fig3 , the male element 14 is constituted by a flexible tab which may be articulated , to the body of the half - shell , optionally with a film hinge , ( broken line 20 a in fig3 ) and which has at its end a tooth or projection 40 which can be introduced into a bridge - like female element 18 integral with the half - shell 4 . when the tab 14 is inserted in the female element 18 until the tooth 40 has passed the side wall 54 of the bridge 18 , the tab 14 is movable , with a limited travel , in a direction perpendicular to the plane of the mouths of the two half - shells and its removal is prevented by the tooth 40 which comes into engagement with the side wall 54 of the bridge 18 . in the embodiments shown , the connection means form , in general , a permanent connection between the two half - shells , that is , a connection which is not easily releasable by the user , in particular , by a child . according to a further , optional characteristic of the invention , the container is provided with means which facilitate its opening . these means comprise a thin , flexible tab 42 ( fig5 ) which is integral with the half - shell 4 and which is connected at 44 , optionally by a film hinge , to a portion of the periphery of the mouth of the collar 6 which is intended to be inserted inside the mouth of the half - shell 2 . in the closed configuration of the container , the tab 42 extends along the wall of the half - shell 4 with a portion 46 of its surface interposed between the wall of the collar 6 and a portion of the wall of the other half - shell 2 , adjacent the mouth . in fig5 , the chain line 48 illustrates the position in which the periphery of the mouth of the half - shell 2 is situated when it is associated with the half - shell 4 in the closure position . the container can easily be opened , starting from the closed configuration of fig4 , by gripping and lifting the end of the tab 42 in the direction of the arrow f of fig4 . this operation brings about disengagement of the mouth of the half - shell from the collar 6 of the half - shell 4 . since , in the closed configuration of the container , the half - shell 2 is articulated to the other half - shell about the film hinge or bend line 20 or 20 a which , in this configuration , is flush with a shoulder 50 of the collar 6 , the lifting of the tab 42 permits an opening pivoting movement of the half - shell 2 relative to the half - shell 4 . moreover , since , even in the mutual engagement position , the connection means between the two half - shells permit movement of the half - shell 2 relative to the half - shell 4 in the direction perpendicular to the plane of the mouth with a travel almost corresponding to the depth of the collar 6 or , rather , corresponding to the distance between the shoulder 50 and the engagement rib 10 of the collar , the opening of the container to permit removal of the articles contained therein is further facilitated . a band 52 formed by a film of heat - shrinkable plastics material may advantageously be associated with the closed container , so as to surround the joining region between the two half - shells and to be superimposed on the connection means 12 and 16 or 14 and 18 and at least partially superimposed on the tab 42 , when a tab 42 is present . the band has the function of further ensuring the anchorage between the two half - shells of the container and may also be used to receive informative printed inscriptions , avoiding the use of an explanatory slip inside the container . by virtue of the characteristics described above , the container according to the invention is more compact and manageable and can easily be controlled and handled by the user . it is intended that , the principal of the invention remaining the same , the forms of embodiment and details of construction may be varied widely with respect to those described and illustrated , without departing from the scope of the appended claims . thus , for example , it is intended that other connection means which achieve the same functional capabilities described above may advantageously be used . similarly , the shape of the container and of the two half - shells described above with reference to the configuration described in wo93 / 00267 may be varied to include other shapes such as , for example , a generally egg - shaped configuration formed by two half - shells coupled in an equatorial plane or by two half - shells coupled in a meridian plane of the container . moreover , the term half - shell , as used in this description is not intended to be limited to half - shells with marked concavity and having a containing function but is also intended to include the situation in which at least one of the two half - shells is of generally flattened shape , performing substantially the function of a cover for the other half - shell .
a container for gifts or the like , of the type that is used for association with a food package , in particular , to be inserted in a chocolate egg , comprises two half - shells which can be coupled mouth to mouth and with which are associated connection means that can be mutually engaged in order to keep the two half - shells connected to one another ; the connection means are preferably of the buckle type with a male element integral with one half - shell and a female element integral with the other half - shell , the male and female elements being mutually engageable .