When you shake it all of the water does not come out, just the excess. It does work, but not great. What I found to work much better is http://www.amazon.com/gp/product/B00..._ya_os_product
It has a much bigger sponge so it cools more, does use 4 AA batteries instead of just 1, but has a very good air flow that is variable. It also has a USB wire to power it off of your Computer.