The trial court correctly granted the defendant water pipe (hookah) manufacturer judgment on the pleadings against plaintiff’s claim that it violated Prop. 65 by failing to warn that if used to smoke marijuana, the hookah would expose the smoker to marijuana smoke that contains carcinogens. The opinion follows regulations implementing Prop. 65 in holding that the proposition covers only products that themselves (or possibly in a required use) bring the consumer into contact with a carcinogen. Here, the hookah can be used to smoke other substances. It is not enough that smoking marijuana is a reasonably foreseeable use of the hookah (or even a predominant use).