Safe. Crystal glass is actually glass without a crystal structure. In fact, it is also lead crystal glass, lead crystal, the refining technology of lead glass. The lead leaching out of lead glassware is very small, and it will not have any impact on the body if used by normal adults as drinking glasses or wine glasses. And now many manufacturers will use barium oxide, zinc oxide, and potassium oxide to replace lead oxide to make lead-free crystal glass, trying to achieve the effect of lead crystal. Therefore, the safety factor is still relatively high.