Cosmetic Bottle Manufacturer Glass is the most commonly used material for cosmetic packaging. This includes everything used to clean, beautify and enhance appearance. Why glass? Because glass is a perfect barrier and the best way to protect products from the elements. This makes GLS's beautiful, eco-friendly packaging perfect for aromatherapy oils, herbal remedies, and natural lotions and creams. Amber, brown or flint? Choose color and transparency Choosing a color is not just a matter of taste, itâ??s also about properties. For example, amber glass bottle is perfect for pharmaceuticals, as it offers the best protection against UV rays. Brown glass bottles are perfect for cosmetics, for example, as it gives your product a rustic yet modern look while being easily recyclable. Flint glass is extremely durable and heat-resistant, and is also ideal for ultra-premium and luxury products, such as luxury perfumes.