Containers

1. A container comprising a lid ( 10 ) and a receptacle ( 20 ), the lid being arranged to close the receptacle and comprising:

a static portion ( 18 ) arranged to substantially match an opening of the receptacle to be closed;

a plurality of pivoting arms ( 11 ) coupled to the static portion;

means ( 12 ) for moving the plurality of pivoting arms between a first position wherein the plurality of pivoting arms lie within a perimeter of the static portion and a second position wherein the plurality of pivoting arms lie outside a perimeter of the static portion and engage with a complementary feature of the receptacle,

wherein the receptacle is arranged to receive the lid, having an opening for receiving the static portion ( 18 ) of the lid, proximal to the opening there is provided a relatively inward-facing projection ( 25 ) to support the lid, and the relatively inward-facing projection ( 25 ) comprises a plurality of springs ( 23 ) arranged to provide, in use, a relatively upward force to the lid ( 10 ).

2. The container of claim 1 , wherein the plurality of springs ( 23 ) are each arranged in a recess ( 24 ) in the relatively inward-facing projection ( 25 ).

3. The container of claim 1 , wherein a circumferential groove ( 22 ) is provided proximal the opening, arranged to receive the plurality of pivoting arms ( 11 ).

4. A method of closing the container of claim 1 comprising the steps of:

placing the lid in an opening of a receptacle ( 20 ) and applying a relatively downward force thereto;

operating a closure mechanism while applying the downward force; and

removing the downward force.

5. The container of claim 1 , wherein the means ( 12 ) for moving the plurality of pivoting arms ( 11 ) comprises an annular member coupled to and movable relative to the static member.

6. The container of claim 5 wherein the annular member is coupled to the static member by means of a plurality of fasteners ( 16 ) arranged to pass through respective slots ( 17 ) in the annular member ( 12 ) and fasten to the static member ( 18 ).

7. The container of claim 6 wherein the annular member ( 12 ) is provided with a plurality of teeth on an inner circumference thereof.

8. The container of claim 1 , wherein the means for moving the plurality of pivoting arms and the plurality of pivoting arms each comprise complementary couplings to facilitate a relative pivoting action therebetween.

9. The container of claim 8 wherein the complementary couplings comprise a substantially circular recess ( 12 a ) and a substantially circular projection ( 11 a ), whereby the substantially circular projection lies within the substantially circular recess and is arranged to rotate within it.

10. The container of claim 1 , wherein the plurality of pivoting arms are each coupled to the static portion by means of fastener ( 14 ) arranged to pass through a respective slot ( 15 ) in each of the plurality of pivoting arms and fasten to the static member.

11. The container of claim 1 , wherein the lid is provided with one or more vents ( 50 ) to permit the escape of gas from within the receptacle ( 20 ).

12. The container of claim 1 , comprising an indicator to indicate the locked or unlocked status of the lid.