Sales of goods but not sales of services are covered under the Restatement, Section 402A. Furthermore, the plaintiff will not prevail if the product was safe for normal handling and consumption when sold. A glass soda bottle that is properly capped is not in a defective condition merely because it can be broken if the consumer should happen to drop it, making the jagged glass dangerous. Chocolate candy bars are not defective merely because you can become ill by eating too many of them at once. On the other hand, a seller would be liable for a product defectively packaged, so that it could explode or deteriorate and change its chemical composition. A product can also be in a defective condition if there is danger that could come from an anticipated wrongful use, such as a drug that is safe only when taken in limited doses. Under those circumstances, failure to place an adequate dosage warning on the container makes the product defective.
The plaintiff bears the burden of proving that the product is in a defective condition, and this burden can be difficult to meet. Many products are the result of complex feats of engineering. Expert witnesses are necessary to prove that the products were defectively manufactured, and these are not always easy to come by. This difficulty of proof is one reason why many cases raise the failure to warn as the dispositive issue, since in the right case that issue is far easier to prove. The Anderson case (detailed in the exercises at the end of this chapter) demonstrates that the plaintiff cannot prevail under strict liability merely because he was injured. It is not the fact of injury that is dispositive but the defective condition of the product.