Glass containers can also be used for aerosol packaging. They are available with or without plastic coating. The plastic coating may be totally adhered or non-adhered and vented. These containers pose less compatibility problems, and hence corrosion problems are eliminated. The level of the contents in the glass container can be easily visualized. Glass is used in products that have lower pressures and lower percentages of propellants. Glass also allows greater freedom in designing the container. Plastic coatings on glass containers provide greater resistance to breakage. The plastic coatings may also serve several other purposes such as identification, protection from UV light and absorbing shock from production operations like crimping. Glass containers are generally used for small volume solution aerosols, which operate at low pressures.