How to Use and Maintain Travel BottlesFilling: Open the flip-top cap, unscrew the collar/base if needed, fill with shampoo or lotion, and leave a small air gap at the top to prevent leaking from air pressure changes.Cleaning: Wash with warm, soapy water and a bottle brush between different products.Drying: Let all parts dry completely upside down before refilling to avoid mold growth.

