Actually, there is one rule about marinades. When they include an acid, be sure to use non-reactive containers. These are dishes and bowls made of glass, plastic, or ceramic. Containers made of aluminum or other metals react with acids and add a metallic flavor to food. My favorite container is a resealable plastic bag. I set the bag in a bowl so the liquid comes up the sides of the food and covers it evenly. If there is not enough liquid, I turn the bag over every hour or so.