A big bin means you don’t need to empty it as often. The largest I’ve seen is 800ml, but anything over 500ml is decent. With many bots now pulling double duty as mopping robots, plus the popularity of self-empty dock / charging bases, it’s getting harder to find small robot https://keybookmarks.com/story19481818/o-truque-inteligente-de-automatic-vacuum-cleaners-que-ningu%C3%A9m-%C3%A9-discutindo