Reduce, reuse, recycle

If, like me, you are the kind of person who experiences creeping existential guilt about sending to landfill things with recycling symbols on them --

-- and, like recent-past me, you Do Not have the cope or executive function to work out how to get toothpaste tubes into a clean and therefore recyclable state so you just Give Up every time the nest of too-empty-to-be-useful toothpaste tubes gets too large --

-- then I am here to (stultifyingly) inform you that you can sort of squeesh the edges so the thing opens back up, and then run a dribble of water in through the top until it stops foaming quite as much, and the squirt a little of the water out so there's an air gap, and then cap it and shake it and leave it to think about what it's done until next time you're brushing your teeth. Whereupon you can give it another shake, empty it out, rinse it again, and leave it to dry.