USB-powered Mini Fan
This is a simple carriageable fan which is powered by USB or 3x AAA batteries. One will amount you alone $6 and you can Choose from Yellow or Black. More Pics after the break
fan
The BedFan, Maybe its Cheaper
Here is Cheaper alternative device to the air conditioner is the BedFan. The device (BedFan) claims to keep you cool & aired on hot summer nights. It is not pollution the environment and saving on electricity bill.