Water cooling components are not cheap. Key components consist of the radiator, CPU block, and the pump, while the less expensive components consist of tubing and radiator fans. There is sometimes the added cost of the reservoir, which almost always adds around 40-100 Canadian dollars to the total. Keeping this cost in mind when I decided to water cool, I opted to make my own reservoir and save my money. Reservoirs are fairly simple things, an input on one side and an output on another. Why pay so much for such a simple thing?