This is very cute with it's suction cup base that holds the little beatle upright. It also works well as an air purifier for small areas. For me it is in my truck that this little guy hangs out and does it's job. Easy to fill actually pretty long lasting fill. I added a drop of essential oil and let it clean the air in the truck. The base seals to a surface and should you need to pick it up just grasp the little tab on the base and it releases easily. Driving around with this I was concerned about bumps in the road and what it would do,but it sits well inside the base and no spills.
My reason for four stars is that that it gets hot while running.