• plastic, silicone
• Spill proof design-- the innovative spill-proof design ensures that your baby's drinks stay in the bottle, preventing messy spills and leaks
• Portable and convenient-- lightweight and compact, these silicone bottle caps are perfect for on-the-go use, fitting easily into diaper bags or backpacks
• Safe materials-- made from plastic and silicone, these water bottle caps are safe for baby use, ensuring no harmful chemicals come into contact with your child's drinks
• Easy to clean-- the removable design allows for thorough cleaning, ensuring that every part of the water bottle conversion cover can be easily washed
• Versatile use-- ideal for juice, water, and milk bottles, these water bottle straw cap Replacement is suitable for transitioning babies from bottles to cups, making them a versatile addition to your baby gear