Olympic Weights Made From Bottles

This is an instructable for how to make a olympic weight. The parts are easily found in the bin.
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Materials:
2 - Little bottles;
1 - A piece of PVC pipe with a internal diameter equal or next to the external diameter of the bootle (15 cm);
1 - Ground stone (2 kg);
1 - Some kind of glue;

Tools:
1 - Saw;
1 - Heater (in my case, the stove );
1 - Something with a conical tip;

1 -With a saw, cut a piece of piepe with 15 cm.
2 - Sandpaper the borders.

1- Heat the tip of the tube until it soften.
2 - With the help of something conical, widen the tip of the tub until fit the cover of the boobtle.
3 - Do it at the other side.

1 - Glue the covers in the pipe.

1 - Fill the bootles with the rocks.

1 - Screw the pipe in the bottles.
2 - If you prefer, fill the bootles with water to do it more weight.

Exercise