V-vials are commonly used for storing samples or solutions and are often used in analytical and biochemical laboratories. This type of vial has a bottom with a V-shaped groove, which can help effectively collect and remove samples or solutions. The V-bottom design helps to minimize residues and increase the surface area of the solution, which is beneficial for reactions or analysis. V-vials can be used for various applications, such as sample storage, centrifugation, and analytical experiments.