I reuse glass jars for candles if they are the jar jelly comes in since they can handle higher heat, never use the thin glass for making candles. The bottoms can be cut off to make light fixtures to allow light in walls. Of course you can put a small hole in the bottom and they will last longer as plant starters and the kids can see how the roots grow, if they have a narrow top you cut that off and sand down the edges to avoid cuts. Yes, they work well to make arrow heads. And, as above stated, if they are clean they can be remelted for new glass.
Tons of uses for cans including solar collectors, and if you open up the soda cans they work well as light reflectors also just don’t have them against a wall LOL
Lint, card board and paper products get reused here making fire starter and soon fire logs just to use up more of it
By reusing most of our trash we have reduced down to plastics for the most part and lately there have been some really cool ideas coming out to recycle them, but which would require electricity after SHTF.