Reagent bottles are specifically designed containers used to store liquid chemicals, and they come in various sizes, shapes, and materials. The most common materials used for these bottles include glass and high-density polyethylene (HDPE). Glass reagent bottles are generally preferred for their inertness and resistance to chemical reactions. They are ideal for storing volatile solvents or corrosive substances. On the other hand, HDPE bottles are lightweight, shatterproof, and more resistant to impact, making them a practical choice for various laboratory settings.