Car cup holder adapter is designed to securely hold large water bottles during travel. It features a stable plastic structure and optimized sizing, delivering reliable support and preventing tipping in vehicles or storage areas. Optimized Holder Size provides secure support for half gallon bottles, keeping large drinks upright during movement Tool Free Installation Design slots easily into standard holes on plastic milk crates or mesh trays without extra equipment Durable Plastic Construction offers long term use while remaining lightweight and easy to carry Stable Insert Structure reduces rolling and spills when driving, camping, or organizing storage spaces Wide Compatibility Use works as a water bottle cup holder adapter for many large bottle styles Item Name: Cup Holder Adapter Material: Plastic Features: Stable, Portable, Easy Installation Dimensions: Length: 12 cm (4.72 inches) Width: 12 cm (4.72 inches) Height: 21.5 cm (8.46 inches) Capacity Reference: Suitable for large water bottles up to half gallon size (1.89 L) Ideal for car trunks, camping trips, picnics, garages, workshops, or home storage. Perfect for organizing large drink containers and keeping them within easy reach.