🍼 GREAT FOR AIR TRAVEL. Use when traveling by air to prevent effect of pressurized cabin on the bottle. 🍼 SPILL-PROOF BOTTLE. Keeps contents of bottle safe and secure in the refrigerator, when transporting and while warming. 🍼 EASY TO CLEAN AND STERILIZE. Reusable bottle travel caps are dishwasher (top rack only) and safe for use in electric sterilizer, microwave sterilizer or boiling water. 🍼 ENVIRONMENT FRIENDLY: New Use Of Old Baby Bottles, Turning it Into Food Storage Container. 🍼 Please Note: This is an aftermarket product produced by ROMIRUS. ENVIRONMENT FRIENDLY: New Use Of Old Baby Bottles, Turning it Into Food Storage Container.