Wine funnels aid the decanting process by funnelling the wine into a decanter. Thereafter, the precipitate may easily be separated by filtration, decanting, or centrifugation. Another reason for decanting wine is to aerate it, or allow it to "breathe". Treatment for such minerals may extend only to filtration or decanting with oxygenation. The second part contains details on, choice of glasses and instructions for decanting wine correctly. The method of decanting liquid from a dewar depends upon its design. This is often compared to the decanting of toddy to enhance its flavour. One simple way to reduce the heat of decanting is to open valves slowly. The number of decanting sites was reduced to minimise the reserves of cans. After decanting they should be consumed within a few days. This design intended to be used for decanting storm water. Haskell hypothesizes that the smaller were used for decanting from pithoi and for temporary storage. The decanting site was originally proposed in Ma On Shan, until opposition came from parents.