A lawyers can file cases based on product liability. This could be a specialization, or he could do it as a part of his general practice. Product liability is an area of law in which manufacturers, distributors, suppliers, retailers, and others who make products available to the public are held responsible for any damage the products may cause; the product in this case is usually limited to tangible items. Examples of cases include lawyers handling injuries resulting from defective consumer products like airbags, guns, lawnmowers, football helmets, and tobacco. The laws for this vary widely from state to state, requiring proof of various kinds. Claims can be filed on the basis of negligence, strict liability, breach of warranty and consumer protection. Types of liability include a manufacturing defect, a design defect, or a failure in adequate warnings in the marketing exercise.