Check out 20ft Cargo Container Light Blue Low-poly 3D model on CGTrader for $6. High-quality mesh by Eleanie: 128748 polys, 71562 vertices. PBR, Textured, UV Mapped.
BLEND (Blender, filesize: 52.1 MB), OBJ (OBJ, filesize: 143 MB), FBX (Autodesk FBX, filesize: 177 MB), STL (Stereolithography, filesize: 135 MB), TEXTURES (Textures, filesize: 122 MB), PNG (PNG, filesize: 122 MB)