Any ideas how to crush a plastic bottle that i could build using only human power no electricty or gas... like i thought of burning it but that immites fumes then i thought of using a basketball needle and suck the air out but i dont no what would suck the air out any ideas?
Fill it with hot air and put the cap on. Put it in a freezer and it will crush.
Try a press and lever. The bottle goes between two surfaces (wooden boards, perhaps. The top board is attached to a fulcrum, and has a lever coming on top of it. Then you apply weight to the other end of the lever, and make it long enough that crushing the bottle is easy. (Much easier to crush bottles if you take off the top.)
