Flip lid mold, also known as butterfly lid, because the hinge part of the lid is like a butterfly. This lid is a true high-tech product. However, all butterfly hats have one characteristic in common. That is, there is a connector for connecting the cap and the base of the bottle cap, which is usually screwed into the neck of the container, or directly snapped.

Now flip caps are widely used in many fields, such as cosmetics, detergent packaging, edible oil packaging, some pharmaceutical packaging and some water caps.

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