This teat adapter for paper packs is perfect for hydrating on the go. I used to keep it in my emergency kit with liquid formula. Now that my child has outgrown it, I hope it can be useful for someone else. If you're hesitant to buy one because you don't use it often, having one for emergencies might protect your precious child. How about it for a mother's peace of mind? I only used it once for a test, so it's practically new. I will send it after sterilizing it by boiling. - Brand: ChuChu - Product Name: Teat Adapter - Purpose: For paper packs - Features: Convenient for hydration when外出 - Features: Convenient when leaving your baby with someone - Country of Manufacture: Japan