QUESTION: Can I hold Burger King responsible for serving a sandwich with a piece of glass in it? ANSWER: It is the duty of manufacturers and other product liability defendants to provide a defect-free product to the consumers. In the case of food products, any substance that is foreign to the food (i.e. not part of the natural process of making the food such as a piece of glass or wire) is considered as a “defect” due to the consumer’s expectations that such materials would be incorporated in the product.