A safe petrol cap without any odors when closed properly and without any fuel leakage. You can put petrol and check the petrol pump to see if the fuel quantity is correct at 10 liters. It also has a funnel to pour the petrol into the car whenever you want. I bought it because at that time, with the price increases, I had petrol at the old price two to three times a day after a month. Then I got it for free with points from a well-known fuel company that I use, which offers 98 octane petrol every Tuesday.