LifeFactory 8oz Glass Baby Bottle with Hard Sippy SpoutThis wide neck 8oz borosilicate glass baby bottle is designed to grow alongside your little one. With a variety of nipple sizes and sippy caps our bottle adapts to your baby's changing needs. As your little one graduates from cradle to kiddo, our vented hard sippy cap (12+ months) quickly converts a baby bottle to a sippy bottle. The wide neck makes it easy to fill and clean while the silicone grip makes it easy to grip and easy to love.