Recycling not only helps preserve the environment, it can save you money. By cutting down your glass bottles into cups, vases, funnels and votive holders you get double or triple work from a bottle you otherwise would have thrown away. Plus, glass bottles often have attractive silhouettes and pleasing designs printed on them that can give your decor an eclectic flare. A common method of cutting glass bottles involves kerosene and a string, but using a Dremel tool offers a higher success rate and more precision.
Wrap masking tape around your glass bottle right above and right below where you intend to cut. The space between your pieces of tape should be perfectly circular and no thicker than the edge of your diamond wheel. Make sure the line doesn't tilt at all--this will result in an asymmetrical cut.
Put on your safety gear to protect your eyes, mouth and hands from glass dust. Rubber gloves are preferable to other kinds of protective gloves because they allow you to grip the bottle securely. Fill a spray bottle with cool water and keep it nearby.
Snap your 545 diamond wheel into place on your Dremel tool. Hold your bottle with the mouth pointed toward you and down at a 45 degree angle. The taped line should be on the end closest to you.
Set the edge of the diamond wheel against the exposed glass between the pieces of tape and draw it gently over the glass. Do not push or force the wheel; this makes it run more slowly. Score around the circumference of the bottle once.
Spray the scored glass with water to cool it. Score the glass with your diamond wheel a second time and spray it again. Continue scoring and wetting the glass until you cut all the way through it.