Drinking Water Issue

Hey, so I recently moved in a flat and it was semi furnished. I am missing a water purifier here.

I am against the idea of setting up a water purifier of my own pocket since:

1. It's costly
2. My company is not doing good so I might have to look for another job after 3 months or so

What can I do right now to have drinkable water. Ordering water jar everyday is also costly.

Thanks for your inputs!!!!