Stanley Cups Contain Lead, But Company Assures Safety

Other Insulated Water Bottle Companies Confirm Lead-Free Products Amid Controversy

Stanley cups have been found to contain lead, used as a sealant for insulation, but the company assures it's covered by a layer of stainless steel and not exposed to consumers unless the cup is severely damaged.
Social media posts showing mixed results from at-home lead tests on Stanley cups have gone viral, but experts argue these tests are not reliable.
Other insulated water bottle companies such as Hydroflask and Owala have confirmed their products are lead-free, while Yeti and S'well have not confirmed the absence of lead in their products.
Lead exposure can cause serious health issues, including learning and development problems in children, and anemia, high blood pressure, lung damage, cancer, fertility problems, tooth and bone loss, kidney problems, brain damage, and even death in adults.
Despite the controversy, Stanley cups remain popular, with some consumers stating they are aware of the lead content but do not care.