Topic summary
Crystal glass
Extracted from the Wikipedia article Lead glass.
Lead crystal glassware was formerly used to store and serve drinks, but the health risks of lead have made this use rare. Lead crystal is unsafe to drink or eat from, as the neurotoxic lead leaches out of the glass and into the food. An alternative material is modern crystal glass, in which barium oxide, zinc oxide, or potassium oxide are employed instead of lead oxide.