Abstract: A shipping container for enclosing a material container containing nuclear and/or other hazardous material. The shipping container can include a body having an open top and a lid assembly for closing the open top. The body can include a liner arranged in spaced relationship with the body to define a space therebetween. The lid assembly and the body can together define a storage chamber in which the material container is housed. The lid assembly can have a lid top and a lid liner coupled to the lid top to define a space therebetween. The space in the lid assembly can also include one or more reinforcing members to increase the compression strength of the lid assembly. The spaces in the body and lid assembly can be filled with a liner material, such as foam, to increase stiffness.