An enclosure comprises a bottom container and first and second shelves hingedly connected to the enclosure. The first shelf is movable between a storage position in which its shelf receiving portion is positioned entirely within the bottom container and an in-use position in which its receiving portion at least partially extends beyond a first corresponding wall of the bottom container. The second shelf is movable between a storage position in which its receiving portion is positioned entirely within the bottom container and an in-use position in which its receiving portion at least partially extends beyond a second corresponding wall of the bottom container. When the first and second shelves are in their respective storage positions, the receiving portions of the first and second shelves are positioned in a stacked arrangement such that the second shelf receiving portion is higher than the first shelf receiving portion within the bottom container.