The tommee tippee closer to nature 5-pack bottle set is the next-best thing to breastfeeding. theyre designed to mimic the feel and movement of moms breast, making the transition to bottles easier. vacuum-free feeding eliminates excessive airflow, for more formula and fewer bubbles in babys tummy. the bpa-free, wide neck bottles are easy to clean, and caps are included for easy transport. Each bottle holds 9 ounces.