Here's a round-up of some of the key products in our investigation and what you need to know about them: You'll use 85% less plastic opting for this compared with buying four of Carex's 250ml bottles.

Better still, each bar lasts 60-80 washes, that's the equivalent of three 250ml plastic bottles. Swapping to a shampoo bar is a simple yet effective way to help your eco halo and your purse ...

“One Lush Shampoo Bar is the equivalent of three 250ml plastic bottles of shampoo, and lasts up to 85 washes.” Over the last 14 years, Lush has sold 41.3 million solid shampoo bars ...