Soft mouthpiece and straw protect the baby's tender mouth while drinking. The design is suitable for beverage bottles with calibers of 2.8 cm and 3.5 cm. Versatile use to reduce splashing and spilling when children drink bottled beverages in everyday situations. The cover can be converted to function as a straw, enabling continued straw drinking while minimizing splashing or spilling. The lid features a special sealing structure that keeps the cap tightly closed and prevents liquids from spilling out. Use scenarios At home during meals or snacks, when a bottle needs controlled, spill sipping. While traveling in the car, stroller, or outdoor outings, to reduce mess and make drinking easier for little children. At daycare or schools where bottles are used, providing a secure, spillresistant drinking option for kids. Specifications and features Function: transforms from a bottle cover into a straw drinking option, with spill prevention in mind. Compatibility: designed for beverage bottles with calibers of 2.8 cm and 3.5 cm. Size: compatible with standard bottle calibers as specified; suitable for babies and young children. Material/structure: soft mouthpiece and straw for gentle contact with the mouth; lid built with a sealing mechanism to prevent leaks. Performance: aims to reduce splashing and spilling during drinking while offering a convenient switch between bottle use and straw use.