One very useful bottle I’ve had donated a couple of times is an Old Tom strong ale bottle, which comes in various flavours, including a chocolate beer. It’s has a heavily embossed branding section on the main body section, but the neck and bottom sections have protruding smooth sections that are just big enough to set the cutting wheel onto, which makes them useful for container cuts or for removing the bottom.
The bottles usually cut pretty well as the glass is consistent and fairly thick, and the preparation of the edges goes very well indeed as a result. The photo to the right shows the cut at the neck, finished to a good standard.
Once prepared, the first step I take is to place the wick in the centre of the bottle. I prefer to use small piece of 1mm black high tack double sided tape to stick it to the bottom of the glass, to really help it stick and allow a strong tension upwards for straightness. Once centred, I wrap it round a wick pin, which I find easier than to pierce the wick with it, as it enables you to tension the wick if required.
All that remains is to pour in the candle. I like to use a strong colour dye, such as orange or red, to give a bit of contrast to the bottle colour. There’s much better advice on candle-making on the net than my efforts, but I’ve been quite pleased with the results so far. Most look pretty neat, and make a nice gift for family or a friend. I made a couple for the friend who donated the bottles, and they keep them on the fireplace just for show as they like the end look. The bottle diameter has been good for the candle burn and the melt-pool, without tunnelling, and a test burn I did for curiosity showed a full Old Tom burned for over 24 hours.