Open Box, 1 bottle has been used one time. The other 3 are brand new Bottle Features: Anti-colic, triple-vented silicone nipple Soft, squeezable, silicone body Stable, non-tip base Easy-to-read volume scale Made of BPA-free, non-toxic silicone Durable & easy to clean, dishwasher safe. Familiar, Mom-Like Softness: A squeezably soft, breast-like silicone baby bottle provides a smooth transition to bottle feeding, or when combining with breastfeeding, without the worry of nipple confusion. The only baby bottle nipple to feature 3 anti-colic vents and a non-collapsible design, so baby keeps the perfect latch without any post-feeding fussiness, gassiness, or discomfort. The flexible, wide-neck design is easy to clean, and the bottle is dishwasher safe and microwave safe. It can be sterilized in our Microwave Steam Sterilizer. Premium, Baby-Safe Silicone: Made with naturally hygienic, food-grade silicone that’s BPA-free, phthalate-free, lead-free, and PVC-free. 100% silicone interior. Note: because silicone is a naturally heat-resistant material, we recommend warming your formula or breast milk before putting it into the Flexy Silicone Bottle, rather than trying to warm it in the bottle. Milk or formula can be warmed in the bottle, but it will take longer. Shop my closet 🚪, bundle and save 🛍️! Please reach out with any questions