errrrrh, I don't suppose you considered "a hexagonal prism" as an answer.
A hexagonal prism
hexagonal prism
a hexagonal prism
Yes, it could be.
write a real answer
It's called, not altogether surprisingly, a hexagonal prism. If the bases were hexagons and the other faces were triangles, it would be a hexagonal antiprism.
A cylinder.
a rectangular prism
Two hexagons, 6 rectangles.
A polyhedron that has 2 congruent faces is a PRISM. To be a prism, all the other sides (not including the 2 that are congruent) have to be 4-sided.
A polyhedron that has a face that is not a base is a triangular prism. In a triangular prism, the two triangular faces serve as the bases, while the three rectangular faces are considered lateral faces. These lateral faces are not bases, demonstrating that a polyhedron can have faces that are not classified as bases.
The same !!