Air tight cap plastic bottle seals the bottle's opening tightly, preventing air from entering or escaping the bottle. This kind of bottle is typically used for storing liquids, such as gulab jal, nail paint remover, etc., to prevent contamination. Both bottle and cap are made from plastic, which makes this ait tight cap plastic bottle lightweight, inexpensive, and easy to manufacture. The cap has a threaded design that screws onto the bottle's opening, creating a tight seal. The cap can be opened and closed easily to make the bottle more convenient to use.