Making bongs is a pastime that you need to be very careful to learn if you want to smoke tobacco in something that you made yourself. You are going to have a lot of options because you will have made the bong yourself, and you can make decorations for it that are going to be amazing for you to see. This is going to be a fun project for you, and you need to take it seriously so that you will be able to make the best art possible when you are working on your glass.
The bongs need to be in a shape that you think you will use as often as possible, and you need to start thinking about how you are going to get bongs that are going to look nice. You may want to sell them, but they need to look nice at the very least. You are going to get much better results because you are going to think ahead about how these things are going to look, and you will be able to make changes to your setup that only you can make.
Ask a glass blower how they would plan to do these things, and see if they are going to give you options for painting that are going to go outside the norms of what you are used to. You cannot get anything from this process unless you are going to use them the right way, and you need to be making them the right way at the same time. Everyone who is going to have a good time making these needs to have a way of making them well that they learned from someone who is skilled.
The glass bongs that you make are going to be art pieces that you are going to be able to make on your own, and they are going to be amazing pieces of glass that you can sell for a profit. You just have to learn how to do it right the first time so you can enjoy the process.