seal

Vial closures are the components used to seal and secure vials, which are small containers typically made of glass or plastic.
Vial closures play a crucial role in maintaining the integrity of the contents within the vial, preventing leakage, contamination, and evaporation.
An aluminum cap for vials refers to a closure made of aluminum that is used to seal and secure vials. Aluminum caps are commonly used in various industries, including pharmaceuticals, laboratories, and food and beverage.

Reagent bottle is a type of laboratory glassware used for storing and dispensing chemical reagents. Reagents are substances that are used in chemical reactions or laboratory analysis to produce a chemical change or to detect, measure, or test other substances. Reagent bottles are specifically designed to safely contain and preserve these reagents.
Reagent bottles are typically made of glass, although plastic versions are also available for certain applications. Glass reagent bottles are preferred because they are chemically inert, meaning they do not react with most chemicals and do not contaminate the reagents being stored.