Hey mamas, the Breastmilk Storage Bottle - Wide Neck 6oz (10pcs) set is a perfect fit for wide neck pumps like Spectra, Avent, and Horigen! These BPA-free, food-grade PP bottles have a wide-mouth design for easy cleaning and are ergonomically designed for a comfortable grip. With a writable surface, you can easily label them using a regular pen or dry erase marker, and erase with soapy water. Safe for both mom and baby, these bottles meet FDA and EU food contact regulations. A great, high-quality option for storing your milk with ease and convenience!