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| Saw the tube at 2.5 cm from the end. | Saw it also near the piston. That will make it easy to extract. | Wash the piston and place it the lower as possible. | Get ready the water, the plaster, the container and a spatula. Plan 2 part of water for 3 part of plaster. |
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| Pour the water into the container. | Sprinkle the water with the plaster. Mixt and wait 10 minutes. | Fill the tube to the brim. | As soon as it takes, stick the straw off centre and slanting. |
