Casamista is a small portable humidifier that fits on top of any water bottle or glass. It’s powered by a USB cable connected to your computer or AAA batteries. Design by Alan Wisniewski for Umbra.
Casamista Portable Humidifier, $25.00
Available in black or avocado.
moddea 
It’s a small humidifier that I can bring everywhere I want to increase moisture. It’s a great gadget.