Watercooling....... Metal water tank??

[App]

I was thinking what kind of water reservoir to use for my new watercooling set. Most people are using a plastic tank. Plastic is an insulator, isn't it?
Since I'm not planning to use a radiator and a Peltier, The size of my water reservoir but also the material is important. I'm thinking about a metal reservoir which should radiate the heat well. Has anybody some idea's what kind of metal tanks are available? Thx

[Colin]

You can get an aluminum electrical junction box. If there is copper or brass in your system, you want to stick with plastic, otherwise your system will turn into a battery.