What are the top 3 items that I need when traveling by plane.
When packing for this trip, you should pack: 
1. An empty reusable water bottle to fill at the airport so you can stay hydrated. 
2. A packable airplane travel pillow so that you can sleep comfortably on the flight.
3. A snack in case you get hungry.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: What are the top 3 items that I need when traveling by plane.
### Input: 
### Response: When packing for this trip, you should pack: 
1. An empty reusable water bottle to fill at the airport so you can stay hydrated. 
2. A packable airplane travel pillow so that you can sleep comfortably on the flight.
3. A snack in case you get hungry.