I'm trying to figure out how much soap is left in the tub, but of course I have no idea how much the tub itself weighs. Anyone know?
you also could weigh a new full tub and then subtract your total weight of yours...
An empty 150 ml Proraso container (green) with lid weighs 28 g.{base = 17 g, lid= 11 g}
I'll have to load hard.