Dr. Brown’s unique internal vent system allows milk to flow freely from the bottle. It’s what makes our bottle work as well as it does. That also means that when the parts and nipple are on the bottle, it is an “open container.” To ensure the bottle does not leak while transporting it, here are a few tips:

• For short trips: Use the included travel disk and keep the bottle upright.
• For longer trips: Remove the parts, collar, and nipple from the bottle and screw on a travel cap.
• For air travel: Changes in pressurization can affect the internal vent system and cause bottle contents to leak. Remove the parts, collar, and nipple before taking off and screw on a travel cap. Once the cabin is pressurized, you can put everything back together.