There are limits to the number of duty-free items you can bring into Mexico. Passengers over the age of 18 may purchase a maximum of 200 cigarettes, 25 cigars or 200g of tobacco, and up to three litres of alcohol. You can spread your purchases between the adult passengers in your group prior to your arrival in Mexico. Make sure that each adult in your group is not carrying more than the allowance for an individual. If you are found to exceed the limit, you will be fined and there is no option to dispose of the goods.