This is an old school technique a blower uses to make their own tubing. Usually made on a blow tube with a colored stick of glass. Coil Pot by a blower – What you do here is get a blow tube, we usually use a 12mm tube. Flare the end open and then get you some of your favorite colored rod of glass. Heat this rod up and when it becomes hot and malleable you will lay it around the blow tube. You will build this up and it will look like what a potter does with clay when they make a pot. Hence the name coil pot. Once you have this built up you can melt it all together into a bubble and then you can make a tube or whatever you want with it.