This highest quality extra virgin olive oil has been infused with the essence of white truffle (tuber magnatum pico). This Urbani Truffle Oil once opened retain its aroma for very long time. If you wish to last even longer once opened store in refrigerator. It will become cloudy at cold temperature, but once brought to a room temperature 30-40min would become clear with fresh aroma. Use it sparingly, just a few drops go long way.