The Dr. Brown's baby bottle bundle includes a 5 oz anti-colic wide-neck bottle and a 2-pack of storage and travel caps to take your bottles on the go. The anti-colic bottle features an internal vent system clinically proven to reduce colic, spit-up, burping and gas for more comfortable feedings. Its vacuum-free design provides a flow rate closest to breastfeeding so baby can feed at their own pace from the breast-like nipple. This supports proper latching and eases switching between breast and bottle. The vent system also preserves nutrients to aid digestion. The BPA-free bottle grows with your baby and can be used with or without the vent system in place. It is dishwasher safe and recyclable. The 2 reusable travel caps seal bottles for transporting, storing in the fridge, and warming. They prevent spills and are great for air travel by stopping cabin pressure affecting the vacuum-free bottle. The caps simply replace the nipple, collar and vent system to seal. They are BPA-free and dishwasher safe too. Together these products provide a complete feeding solution. The anti-colic bottle optimized for comfortable, natural feeding can be paired with the caps to securely take it on the go. The sets are reusable, recyclable and support healthy digestion.