Makeshift Humidifier
Don’t you hate it when the air in hotel rooms is as dry as a bone? This has to do with turning the AC on full blast 24/7, which won’t do your skin or organs any favors. To introduce some humidity into the air, you don’t have to bring a humidifier/diffuser with you wherever you go.
As long as the hotel room has a radiator, you can turn it into a makeshift humidifier by hanging a wet towel in front of the radiator. When the heat turns on, it’ll hit the towel, thereby turning it into vapor that will humidify the entire room.