Convertible straw cover that turns standard beverage bottles into childfriendly sipper caps. Designed to reduce splashing and spilling while protecting a baby's tender mouth. Key benefits Spill reduction: The cover converts into a straw function to help children drink more steadily and minimize splashes and accidental spills. Gentle on the mouth: The soft straw mouthpiece and flexible straw provide a comfortable drinking surface that is easy on a baby's delicate lips and gums. Secure closure: A special sealing structure keeps the lid tightly closed when not in use and prevents liquid from leaking when in use. Wide compatibility: Fits beverage bottles with a caliber of 2.8 cm and 3.5 cm, making it suitable for many common bottled drinks used by children. Important features Function: Converts quickly between sealed lid and straw mode to suit feeding needs throughout the day. Compatibility and size: Specifically designed for bottles with openings of 2.8 cm and 3.5 cm. Performance: Tight sealing design reduces accidental spills during movement or tipping. Mouthpiece design: Soft and flexible for gentle contact with a baby's mouth. Practical use scenarios On the go: Attach to a bottled drink when walking, traveling, or using a stroller to reduce spills and make drinking easier for an active child. Mealtime and daycare: Use at the table or in a childcare setting to help toddlers drink independently while preventing messes. Car rides and short outings: Keeps liquid contained and provides a softer mouthpiece for safer, more comfortable sipping during short trips. Compatibility note Intended for use with beverage bottles that have openings (calibers) of 2.8 cm or 3.5 cm. Ensure a proper fit before use. This cover provides a straightforward way to convert bottled drinks into a safer, less messy drinking option for babies and young children while maintaining a secure seal and a soft, comfortable mouthpiece.