These beautiful, refillable oil lamps hold about 16 ounces when full. They each come with a small funnel. After filling, replace the wick and let it soak in the oil for a few minutes to saturate fully before the first use. It is advisable to use a pure paraffin lamp oil. This will provide a smokeless, odorless flame. You can add a drop or two of your favorite essential oil. These lamps are made individually by hand, and therefore, may have slight variations in shape size and color. Each lamp is signed and dated.