This metal ice cube was negative for lead, mercury, cadmium and arsenic when tested with an XRF instrument.
For those interested, it had 152,800 +/- 1,400 ppm Chromium (Cr), and 2,896 +/- 493 ppm Copper (Cu). These seem like a good choice if they are your cup of long-island-iced-tea! (Metal ice cubes you freeze so they cool your drink down but don’t dilute your drink). I do have some concerns about putting chromium and copper in alcoholic drink (or other acidic drink) – but that’s another matter entirely!
If you are interested in checking this product out on Amazon, here’s my affiliate link* to a similar product. I don’t know if it is the exact same product as there is no maker’s mark or imprint on these ice cubes – they look the same on all sides.