Step 2: Cutting the bottles
Make sure there is water in the basin of the saw. Don your protective face shield and ear muffs. Flip the switch and then carefully rotate the bottle on the platform, rolling the bottle into the blade with the base against the fence. Concentrate on keeping the bottle perpendicular to the blade. Carefully rotate until you are close to cutting through. Gently hold the neck of the bottle so the weight doesn't cause the bottle to shear in the last few millimeters.
NOTE: A search on Instructables for "cutting bottles" yields many different ways to cut them, good tips on smoothing the edges, and plenty of tips on removing labels. In addition to this Instructable it would be wise to read through some of them and their comments.