18mm 20mm 24mm 28mm Custom Colors Polypropylene Plastic Flip top Shampoo Bottles or Glass Bottles Lotion Bottle Shampoo

Key Components

1. Base/Threads: Screws onto the neck of the bottle.

2. Dispensing Spout/Nozzle: The opening through which the product is poured or squeezed.

3. Living Hinge: A thin, flexible web of plastic (usually polypropylene, PP) that connects the lid to the base. It's designed to be flexed thousands of times without breaking.

4. Lid/Cover: Snaps securely over the spout to seal it. Often has a small peel or lug to open with a thumbnail.

5. Liner (optional): Some have an internal foam or film liner for an airtight seal, while many are "linerless," relying on precise molding to create the seal.

Common Uses

• Food & Condiments: Ketchup, mustard, syrup, honey, salad dressings.

• Personal & Home Care: Shampoos, body wash, lotions, dish soaps, liquid detergents.

• Sports & Beverage: Water bottles (as an alternative to the pull-push sport cap).

• DIY & Chemicals: Some glues, gardening liquids, cleaning fluids (though child-resistant versions are needed for hazardous products).

  

  

  Advantages

  Convenience: Easy one-handed operation, especially useful for squeeze bottles.

  Reclosable & Hygienic: Seals the product after each use, preventing spills and contamination.

  Dosage Control: The spout can be designed for dripless pouring or precise dispensing.

  Cost-Effective: Made as a single piece, simplifying assembly and inventory.

  In summary, the plastic flip-top cap is a brilliant piece of everyday engineering that perfectly marries function, convenience, and low-cost manufacturing. Its main challenges are technical (long-term hinge durability) and environmental (end-of-life recycling).