Don't use aluminum. A food-grade container, usually a white plastic bucket with a lid, that holds at least 6 gallons will do. Most popularily, a glass carboy is used among more advanced homebrewers. This should hold at least 5 gallons. It can be the same type of container as your primary fermenter.
Many people siphon direct from the glass carboy that was used for primary fermenting.
This is usually clear, food-grade plastic tubing. You will need about 6 feet. This is for transferring your beer from one container to another. Cane A stiff piece of plastic tubing about 2 feet long, often with a curve at one end. It connects to your siphon hose and is used when transferring your beer from one container to another.