A solid shampoo bar is the best sustainable Plastic-Free alternative to any liquid shampoo. One shampoo bar is 70% more concentrated than a liquid shampoo bottle so a little goes a long way. 60g shampoo bar is equal to a 200 ml liquid shampoo bottle that gets used in a month. But a shampoo bar can last for months. Read further if you want to know how..? Shampoo bars are available for all hair types from Dry to treated to Itchy to Oily hair. They are packed with hair-loving in