Feature: 1. Wide Diameter Design: Breastmilk storage bottles are designed with a wide diameter, easy to pour in and out of breastmilk, simple and practical. The caliber of the bottle is 5.0cm, which is suitable for NUK, for Dr. Brown and other wide neck bottles. 2. Leakproof Lid: The breastmilk storage container is designed with a leak proof lid that provides a secure seal to keep breastmilk refreshing and safe, while also making it easier to organize and manage breastmilk storage. 3. Wide Application: Breastmilk collection bottles are suitable for refrigeration, can be used to carry and store breastmilk, convenient for baby to eat at any time. The bottles are user friendly, crafted to make feeding convenient and efficient. 4. Food Grade Material: The wide mouth breastmilk bottle is made of food grade material, safe and long lasting.The material is sturdy, lightweight, and specifically chosen for its excellent properties that withstand the rigors of daily use. 5. Reusable: Breastmilk storage bottles can be used multiple times, can be disassembled and washed, easy to clean, making it simple to maintain sanitation and ensure that they are always ready for the next use. Specification: Item Type: Wide Neck Breastmilk Storage Bottle Material: Plastic Size: Approx. 8x6cm / 3.15x2.36in Capacity: 90mlBottle Mouth Diameter: Approx. 5cm / 1.97inApplication: for NUK, for Dr. Brown wide neck bottles, and domestic electric chest pumps. Package List: 9 x Storage Chest Milk Bottles