Before you decide to throw out those almost empty shampoos and conditioner bottles, hear us out. Gather all of those nearly empty bottles sitting idle in your shower and some molds of different shapes. In case you don’t have molds you can also use ice cubes.
Empty all the liquids into a container and mix them well, before pouring them into the molds. Place the molds into your freezer for up to 24 hours. Voila! You just made zero-waste homemade soap, using the leftover shampoo. Amazing hack for getting some eco-friendly and inexpensive soap.