This is just a novelty item, although you can use it as a water dispenser (it does dispense), I guarantee you won't. As mentioned the rubber fish which floats within the water bottle makes the water taste foul. Also as you are re-using the same bottle (difficult to clean), mould soon starts to gather, especially arounfd the fish.
Repped for the review, seems its not worth £7.99 let alone the original retail price, one of those things that would end up binned, in a charity shop or sold for 50p at a car boot sale to get rid of the clutter.
See the review on amazon - It doesn't cool the water itself, you have to put chilled water in it and the fish goes moldy and adds a nice rubbery taste to the water, http://www.amazon.co.uk/Wesco-BS201-Simpsons-Personal-Dispenser/dp/B000F44PQQ
I had one of these. Not even a cooling tower, theres no electronics in it. And that plastic fish in their makes the water taste very chemicaly (if thats a word). I remember almost destroying the tower just to get the fish out, because it made the water taste so bad.
I've been googling it and there's no ifo about how it keeps the water chilled, theres a fish floating around in the water (included) :-D