Dental floss. We know it usually as a small nylon rope that we use to clean our teeth. However, it’s much more than that. You can use it to channel your inner Macguyver!
Due to its thinness and strength, it can be used in the kitchen. It’s especially handy as a cheese knife.
It can also be used for repairs. I used it myself to repair the flow regulator in my toilet tank when my valves also broke until a plumber could get out.