Glass jars are known for their durability. Unlike plastic containers that can warp, stain, or absorb odors over time, glass is non-porous and does not retain smells or flavors, thus maintaining the freshness of the stored items. The screw lid adds an extra layer of protection, providing an airtight seal that is essential for preserving the quality of food items. This secure sealing feature is particularly important for items like spices, nuts, and dried fruits, preventing moisture and pests from affecting their freshness.