Repeat if necessary.
Its solid consistency also makes it ideal for travelling - there's no risk of spillage, and with only a limited amount of liquids allowed on board, it saves space on the plane for other liquid products. You can simply store it in a paper or metal box. Give it a chance and you'll soon understand why it shouldn't be missing from your beauty kit. Like a regular shampoo, it helps remove dirt and grease from the hair and scalp, but because it does not contain water, it does not need a plastic container and thus saves the environment.