What is a one-sentence summary of the following article?
Coil the siphon tube into a circle and place it into a container full of water. Gently push the tube down until it is completely covered, working from 1 end to the other. You will see air bubbles pop up to the surface of the water, as the air escapes from the inside of the tube. Go slowly to allow the air bubbles to escape as you submerge the tube. Once the bubbles stop, the tube is full of water and ready to be drained. To make sure that the bubbles are completely out of the tube, shake it a bit before pulling it out. Now that the tube is full of water, you'll need to stop up the end that you plan to pull out of the container. Fold or crimp the tube in on itself toward the end, creating a barrier. Then, place your finger or thumb over the end, blocking off the flow of water out of the tube. The tube must stay totally under the water during this process or you'll end up with bubbles in it. Slowly and carefully lift the blocked tube end out of the water. Keep your finger covering the end of the tube. And, make sure the other, unblocked end stays securely under the water. Place the blocked end into the lower, empty container. Pull your finger away from the end of the tube. Hold the tube down slightly with your fingers to keep it from flailing around as the water starts to come out. Watch the water move from the higher container and into this new one. If the water flow seems to stall, give the tube a small, quick shake to start it up again.

Summary:
Immerse the tube in a container of water. Place your finger over the end of the tube. Move the plugged end of the tube to the empty container. Unplug the tube.