Perfect shampoo for travelling?

It can be annoying if oversized shampoo bottle is taken away or while hiking it decides to leak in the bag. I used to carry tiny 100 ml bottles with me but as it only lasts for a short time I switched to shampoo bars. That can be used for washing hair, body and clothes too if neccesary. It is not easy to find a suitable one though. All of them listed down here are vegan and cruelty free.  … More Perfect shampoo for travelling?