Mine is cutting the tops off tubes of cream/lotion to get the last bit out!
Use battery aciddawn blue dish detergent let stand for thirty secs and rinse
I do that as wellI save and reuse aluminum foil/paper bags/twist ties etcI have also refused to get a sofa, I insist that my guests sit on pillows on the floor.but that is mainly because I live in a small place in the city.no room for a couch.