I made waste oil soap using lemon-infused olive oil that I hadn't used and had aged for several years (strictly speaking, it's not waste oil). 3 pieces, approximately 70g each, total weight = 205g I added a little yellow food coloring, so some of the lemon scent remains. There are no problems with the cleaning power, and I think it will wash away with the bubbles. Ingredients: Water, caustic soda, old olive oil 100% I used 200g from a No. 5 bottle. Please use it for the kitchen, pre-washing laundry, etc. What you need to be careful of is that, like all waste oil soaps, it has strong cleaning power, so please do not use it on your body or face. As it hasn't been long since it was made, the weight may decrease slightly. Water will evaporate during drying.