A mixing device comprising a receptacle support and a receptacle associated with the receptacle support, wherein said receptacle support comprises: (i) a first member having a first surface which makes face to face contact with a first surface of the receptacle; (ii) a second member which has a second surface which extends in a direction perpendicular to the first surface and makes face to face contact with a second surface of the receptacle, wherein the second surface of the receptacle extends in a direction which is perpendicular to the first surface of the receptacle; (iii) a third member which has a third surface which extends in a direction perpendicular to the first surface and makes face to face contact with a third surface of the receptacle, wherein the third surface of the receptacle extends in a direction which is perpendicular to the first surface of the receptacle and faces in an opposite direction to that of said second surface; (iv) a fourth member which has a fourth surface which extends in a direction perpendicular to the first surface and makes face to face contact with a fourth surface of the receptacle, wherein the fourth surface of the receptacle extends in a direction which is perpendicular to the first surface of the receptacle; (v) a fifth member which has a fifth surface which extends in a direction perpendicular to the first surface and makes face to face contact with a fifth surface of the receptacle, wherein the fifth surface of the receptacle extends in a direction which is perpendicular to the first surface of the receptacle; (vi) a sixth member which has a sixth surface which extends in a direction perpendicular to the second, third, fourth and fifth surfaces and makes face to face contact with a sixth surface of the receptacle, wherein said sixth surface faces in an opposite direction to the first surface; wherein said receptacle support includes a clamp for clamping the receptacle in position between said first, second, third, fourth, fifth and sixth surfaces, wherein said clamp comprises said sixth surface being movable between a first position in which it is arranged to apply a clamping force to clamp the receptacle in position and a second position in which the clamping force is released; characterized in that said sixth surface of said sixth member is arranged to overlie at least 50% of the area of said sixth surface of the receptacle, when in said first position; and wherein said receptable comprises a cardboard box in which is arranged a plastics container. (i) a first member having a first surface which makes face to face contact with a first surface of the receptacle; (ii) a second member which has a second surface which extends in a direction perpendicular to the first surface and makes face to face contact with a second surface of the receptacle, wherein the second surface of the receptacle extends in a direction which is perpendicular to the first surface of the receptacle; (iii) a third member which has a third surface which extends in a direction perpendicular to the first surface and makes face to face contact with a third surface of the receptacle, wherein the third surface of the receptacle extends in a direction which is perpendicular to the first surface of the receptacle and faces in an opposite direction to that of said second surface; (iv) a fourth member which has a fourth surface which extends in a direction perpendicular to the first surface and makes face to face contact with a fourth surface of the receptacle, wherein the fourth surface of the receptacle extends in a direction which is perpendicular to the first surface of the receptacle; (v) a fifth member which has a fifth surface which extends in a direction perpendicular to the first surface and makes face to face contact with a fifth surface of the receptacle, wherein the fifth surface of the receptacle extends in a direction which is perpendicular to the first surface of the receptacle; (vi) a sixth member which has a sixth surface which extends in a direction perpendicular to the second, third, fourth and fifth surfaces and makes face to face contact with a sixth surface of the receptacle, wherein said sixth surface faces in an opposite direction to the first surface;