A container is provided which includes a first portion and a second portion. The first portion and second portion are slidably disposed so that the container is selectively adjustable between a retracted position and an extended position. The container may also be selectively coupled with another container. The container has a retention portion and a receiving portion. In one embodiment, the retention portion is a flange and the receiving portion is a ridge, the flange of one container being selectively coupled with the ridge of another container. The container may also have a guide which guides the slidaby coupled first portion and second portion. The container may also have a stop which prevents the first portion from separating from the second portion.