Mix together: 1 envelope Taco Seasoning Mix 1 envelope Good Seasonings Italian Dressing Mix|Pierce steaks in several places with tines of fork. Rub in oil and dust in seasoning mixture. Then pour Coca Cola (Diet or Regular) around steaks in deep plastic or glass container and seal with plastic wrap. Refrigerate for 24 hours. Drain, and grill or broil as you wish.