what you need
-5l rectangular shaped water bottle
-peace of rope
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Make opening at the top of the bottle and two small holes at top side
Wrap the rope around the neck of the bottle several times, tie two or more nodes to fix it in place.
Then pass the rope through the holes and tie a knot
This box cant be used for heavy tools and filled to the top because bottle plastic if very thin and soft; you can improve a bit this design if you use piercer to make clean holes for the rope and use thick shoelace instead of the rope. In the middle of the bottom of the bottle plastic is thickest and hardest so that s the right place to make hole for the shoelace.