Evenflo Glass 4-Oz Bottles 3-Pack * Earth friendly - This item is reusable and eliminates waste compared to a disposable product * BPA free * Three-pack * Silicone sensitive response nipple senses baby"s pressure and responds with the right amount of liquid * Micro air vents promote an even flow of liquid and prevent nipple collapse * Easy to view the liquid in the bottle and easy to clean * Comes with slow-flow nipple (0-3 months)