Quality materials are essential to the quality of a copper sink kitchen. If it's cheaply made, then chances are it won't last for long. So, it's important to choose a faucet that will not only provide you with the highest level of water quality possible. A good aerator should be able to withstand water pressure, but should also be easy to adjust for hot and cold water. A faucet's cartridge is also important. A ceramic, stainless steel ball, or shaft roller cartridge are some of the most common.