So, where exactly is that lead in your Stanley Quencher?

The 3D X-ray startup Lumafield did a CT scan of a Stanley Quencher water bottle to show you without destroying one (but if your viral insulated cup does happen to break, you should return it).

You can see where an airhole in the stainless steel outer layer is vacuum-sealed with a small lead pellet, which appears red in the image below. That way, it never comes in contact with your beverage in the inner flask or with you on the outside.