Cargo - Bunk BedDesigned shorter than the average bunk bed, this Cargo twin over twin bunk bed is excellent for low ceiling bedrooms. With its whimsical shipping container design and sturdy metal frame, this is one piece that will impress everyone. It features a slat system, no need for bulky box springs with this design. Get a good night's rest, knowing that your child is secure from any falls with the safety guardrail. Cargo Twin Over Twin Bunk Bed Aqua 80. 0"W x