If interior space is an issue, a roof-mounted container is often the way to go. The SkyBox 16 Carbonite from Yakima is so named for its 16 cubic feet of stowage space, which is greater volume than many sedan trunks. The company claims that the product’s aerodynamic shape creates minimal drag (which helps reduce fuel consumption) and produces minimal wind noise when driving at highway speeds. The 47-pound Skybox 16, which measures 81 by 36 inches, can be opened from either side and is claimed by the company to easily latch and unlatch from the vehicle’s roof rack. The Skybox 16 Carbonite lists for $600 and can be purchased at www.rei.com.