Categorize the following list of items according to material: wood, steel, plastic, aluminum
Chair, Hammer, Pen, Bottle
Wood - Chair
Steel - Hammer
Plastic - Pen
Aluminum - Bottle
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Categorize the following list of items according to material: wood, steel, plastic, aluminum

### Response:
Wood - Chair
Steel - Hammer
Plastic - Pen
Aluminum - Bottle