I stopped buying liquid soap many years ago. Liquid soap normally comes in plastic containers, and even if you buy refill packs, this generates a lot of plastic. Further, I have always found that I used far too much liquid soap and thus went through a lot of it. I have been using bar soap exclusively for several years and make sure I buy it package free. My favourite bar soap is Savon de Marseille. I use the 300g bar for personal use, and a 1kg bar in the kitchen for washing dishes; I simply swipe my wooden dish brush along the surface of the soap and clean the dishes with it.
Once the soap bars have reduced to nubs, or ends, I cut them with a knife and melt them in boiling water, thus making liquid soap. The Ikg bar of soap in the kitchen is too bulky to use as hand soap, so I fill the stainless steel SmartBar below with my DIY liquid soap. This container helps remove any food odours such as garlic, as well.
I use the DIY liquid soap as an all-purpose cleaner by diluting it with tap water in a spray bottle. I find this method works just as well as commercial all-purpose cleaners I used to buy.
Old-fashioned bar soap is an effective and low-impact way of cleaning both your body and your home. Using the soap ends means that nothing goes to waste.