Protect your Arduino from water and humidity

Hello everybody, I am building a plant watering system (outside of my home). The only problem that I am having is where should I put my Arduino because I need to protect it from water and humidity. Does any food recipient would be good or it will make some condensation or some mist.

Thank you for helping me!

I have never yet seen a decent purpose-made case. I used a weathproof electrical outlet case. This isn't bad but involved work in order to get a Mega in. It had the advantage of a transparent lid. Next time I will use a school lunch box, or make my own. You might need to consider heat dissipation if you seal the case.

Check the cases here https://www.polycase.com/waterproof-enclosures, use a Gland to seal the holes where wires will go in & out.
https://www.polycase.com/cable-management-venting