Patent ID: 7574789

Claim:
A method of assembling a container comprising an inner tube contained within an outer tube, the method comprising: providing an outer tube having a closed bottom, an open top and a side wall extending therebetween, said side wall defining an inner surface and an outer surface, said inner surface having a recess below the open top thereof; providing an inner tube within the outer tube, said inner tube having a closed bottom, an open top and a side wall having an inner surface and an outer surface extending therebetween, the side wall of the inner tube being shorter than the side wall of the outer tube and including an outwardly flared portion, the outer diameter of said inner tube being substantially similar to the inner diameter of said outer tube; and inserting the inner tube within the open top of the outer tube to a position in which the outwardly flared portion of the inner tube engages a top edge of the recess of the inner surface of the outer tube retaining the inner tube within the outer tube, such that air trapped between the inner tube and the outer tube passes through the recess and vents to atmospheric pressure.