1. Spray Nozzle: Hairspray bottles come with different types of spray nozzles that produce a fine mist to distribute the product evenly over the hair. The nozzle may be adjustable to allow for different types of spray patterns.

2. Capacity: Hairspray bottles come in different sizes depending on the desired use and frequency of application. They may vary in capacity from a few ounces to several liters.

3. Durability: The bottles are usually made of sturdy plastic or glass that is resistant to wear and tear and protects the contents from exposure to light or air.

4. Ergonomics: Hairspray bottles are designed to fit comfortably in the user’s hand, with an easy-to-press trigger that allows for precise application.

5. Compatibility: Hairspray bottles are compatible with a wide range of hairspray products, providing flexibility in product selection.

6. Aesthetics: Many hairspray bottles are designed to be aesthetically pleasing, with colorful or elegant designs that appeal to the user’s sense of style.

In summary, hairspray bottles are an essential tool for hair care and styling, offering several key features such as spray nozzles, capacity, durability, ergonomics, compatibility, and aesthetics. These features ensure that the user can achieve the desired results easily, efficiently, and in style.