I have couple “redneck engineering” solutions I can think of. But most of the time it is out of necessity because it needs to be done on the spot, or a real thing does not exist. Ohh and I don’t have a 3d printer to solve it elegantly.
Examples that I can think of: an LED controller right now is being cooled by a repurposed coller affixed with a metal clamp. It is better bc it works.
I’m using a plastic lid under a mason jar ring lid, with an x cut in it for a watering tube. Better than not having any lid on.

I like grinding chia seeds and soaking them overnight in milk (it takes a while to mix) - then put it in the morning cereal.

Glass Tupperware, if you look all your plastic ones I bet they are scratched - melted or otherwise damaged. All those missing parts end up in the food.