Expensive rumor. This company cheats people. The stupid filter is made of plastic and doesn't absorb any water. You have to freeze the water in the freezer and this takes a very short time. It doesn't matter either. The average home geek will walk around this cheap plastic thing. It won't cool your room, I promise you. You would have to be about a foot away from him to feel the breeze on your hand. It's very messy as there is a tray that tends to overflow. You will have a good chance of getting water everywhere. Although I think it's a cool little trick. It's neat.
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