If the Bottle you ordered is a Boston Bottle, how do you choose your Lid? First of all, you need to check what products you need to fill. Usually, the products we fill in Boston Bottle are skin care products, shampoos, lotions, etc. We need to make the right choice for our own products!Our most common styles are Flip Cap, Lotion Pump and Foam Pump！ The Flip Cap is designed so that the user can easily open and close the container without having to twist the cap or pull it apart. With a simple press of the button on the bottle cap, the lid quickly flips open, and it requires no extra tools or force to open, making it perfect for users of all occasions and ages. The Lotion Pump is designed to be simple, easy to use and extruded with just a gentle press. It is convenient, practical, reliable and environmentally friendly, and it is commonly used in a variety of personal care products such as shampoo, body wash, hand sanitizer and skin care products! Foam Pump is commonly used in hand sanitizer, body wash, dish soap and other products, and its pump head is a special foam generator that converts liquid chemicals into a rich foam. Compared to traditional pump heads, it can save product usage, and the foam cleaning effect is better! Therefore, it is also very important to choose a suitable Lid!