Looking For A Water Filtration System I saw advertised on TV?

I'm looking for a water filtration system I saw advertised on TV... it is for the water coolers that take the huge jugs... it is a jug-like thing that has filters in it, and you put your own tap water in it and it filters it and your cooler cools and dispenses it... I forget what it is called, and would like to find their website? any help?