The 1,000 ml Glass Bottle with 43 mm Lug Neck is excellent quality, flint (clear), food-grade certified, FSSC 22,000 certified, 100% non-toxic, complete lead free, and microwave and dish washer safe. The glass bottle is inert and unreactive and does not allow leaching of chemicals into your product even after repeated usage. The glass Bottle is designed for packing drinking water, milk shakes, Juices - fresh and canned, fresh Bottle milk, oils and vinegar, cold coffee, etc.