The Evenflo Feeding Advanced Breast Milk Collection Bottles provide a quick and easy way to collect, store, and feed breast milk. The Advanced Breast Milk Collection Bottles hold up to 5 fluid ounces of breast milk and can be stored in the refrigerator or freezer. The enhanced silicone sealing discs help reduce spills. Ready to feed? The cap rings on the Advanced Breast Milk Collection Bottles are compatible with Evenflo Feeding Balance + Standard Neck Nipples. These dishwasher-safe bottles are compatible with all Evenflo Feeding breast pumps, as well as most other standard neck breast pump brands. The bottles are 100% free of BPA, polycarbonates, PVC and phthalates and are made of FDA-approved food grade material.