Glass is the only widely-used packaging considered by the U.S. Food and Drug Administration as “generally recognized as safe” or “GRAS.
As such, it remains the optimal packaging choice, safely preserving the flavor and integrity of the foods and beverages it contains while lowering potential exposure to toxic compounds.
There are a few types of glass bottles used for storing liquids may contain lead. Lead is a potent known neurotoxin and can interfere with several functions of the body. Prolonged exposure to high concentrations of lead can cause vomiting, poisoning, and liver and kidney damage. The metal caps used on the top of glass bottles and jars are also known to release a chemical contaminant called phthalate which is linked to several disturbances in the hormonal (endocrine) system.