ELI5: Explain Like I'm 5

Tank car

A tank car is a type of train car that is used to transport liquids or gases over large distances. The car looks like a large metal cylinder with rounded ends, and it is usually painted with stripes to make it easier to see when traveling on the tracks. The tank is made of thick metal and has very strong seals to make sure that the liquid or gas inside doesn't leak out. Tank cars can carry things like gasoline, diesel fuel, propane, and other chemicals that need to be moved around the country.