You need:
1.small fish air pump
2. 4 to 6ft of tubing 3/8 or 1/2
3.Fogger ( I use a holloween fogger works great)!!
4. A Drill and bit
5. Bottle

Instructions:
Use any type of bottle that your fogger will fit in. You will need to drill a hole the size of the tube . Drill another holl so that the cord can get out some how the fogger cord and the air pump tube. Tape up the extra space in the hole. fit the tube in the holeand cord. Fill the bottle with water. turn the air pump on and fooger. Stick the tube in or out of the tank/vivarium.