What type of tank features a double shell with insulation for transporting cryogenic liquids?

The correct choice is cryogenic liquid tanks because they are specifically designed to transport liquefied gases at extremely low temperatures. These tanks consist of a double shell, which is essential for maintaining the low temperatures required for cryogenic liquids. The insulation between the two shells minimizes heat transfer from the ambient environment, thereby preventing the liquid inside from boiling off and ensuring safe and efficient transport.

This design is crucial in the handling of cryogenic substances, as any heat influx can cause rapid boiling and pressure build-up, which could lead to potential hazards. The insulation and double-shell construction are integral to maintaining the physical state of these liquids during transport.