Provide an example of something that is cheap and eco-friendly.
One example of something that is both cheap and eco-friendly is using a reusable water bottle instead of constantly buying single-use plastic bottles. Not only does this save money over time, it also significantly reduces plastic waste and helps preserve the environment.
Complete the following task based on the instruction and optional input provided.### Instruction:
Provide an example of something that is cheap and eco-friendly.

### Output:
One example of something that is both cheap and eco-friendly is using a reusable water bottle instead of constantly buying single-use plastic bottles. Not only does this save money over time, it also significantly reduces plastic waste and helps preserve the environment.