MONSTERS OF SMOKE Bongs How to Drill a Hole in a Glass Bottle to Make a Glass Bong

How to Drill a Hole in a Glass Bottle to Make a Glass Bong

If you are looking for a creative way to enjoy your herb or tobacco, you might want to try making your own glass bong from a glass bottle. A glass bong is a device that filters and cools the smoke from burning herb or tobacco, making it smoother and more flavorful. Glass bongs are usually expensive and fragile, but you can make one yourself with some basic tools and materials.

One of the most challenging parts of making a glass bong is drilling a hole in the glass bottle. Glass is a hard and brittle material that can easily crack or shatter if not handled properly. However, with the right drill bit, technique and safety precautions, you can drill a hole in a glass bottle without breaking it. In this blog post, we will show you how to do it step by step.

What You Will Need

To drill a hole in a glass bottle to make a glass bong, you will need the following items:

  • A glass bottle of your choice. You can use any type of glass bottle, such as a wine bottle, a beer bottle, or a soda bottle. Make sure the bottle is clean and dry before you start drilling.
  • A power drill with a variable speed setting. You will need to adjust the speed of the drill according to the thickness and shape of the glass bottle.
  • A spear-tipped carbide or diamond drill bit. These are special drill bits that are designed to cut through glass without cracking it. They have a sharp point that helps to create a precise starter hole. You can find them at most hardware stores or online. The size of the drill bit depends on the size of the hole you want to make. For example, if you want to make a 10 mm hole, you will need a 10 mm drill bit.
  • A piece of painter’s tape or masking tape. This will help you mark the spot where you want to drill the hole and prevent the drill bit from slipping on the glass surface.
  • A felt-tip marker or ink pen. This will help you draw a dot at the center of the tape to guide your drilling.
  • A folded towel or similar soft pad. This will help you cushion the glass bottle and prevent it from rolling or sliding while you drill.
  • A bowl of water or a spray bottle. This will help you cool down the drill bit and the glass bottle during drilling and prevent overheating or cracking.
  • Protective goggles, dust mask and gloves. These will help you protect your eyes, lungs and hands from flying glass shards and dust particles.
  • A downstem and a bowl. These are the parts that connect the glass bong to the herb or tobacco chamber. You can buy them at any smoke shop or online. The downstem is a metal or glass tube that fits into the hole in the bottle and extends into the water inside. The bowl is a metal or glass piece that attaches to the top of the downstem and holds the herb or tobacco.
  • A rubber grommet or sealant. This will help you seal the gap between the downstem and the hole in the bottle and prevent air leakage.

How to Drill a Hole in a Glass Bottle

Once you have gathered all the necessary items, you can follow these steps to drill a hole in a glass bottle:

  1. Mark the spot where you want to drill the hole with tape and marker. Choose an area that follows the curve of the bottle, as it will be easier to drill than a flat part. Tear off two strips of tape and cross them over your intended drilling site in an ‘X’ shape. Smooth both strips with your finger so that they are lying flat on the glass surface. Then, take your marker or pen and draw a dot at the center of the section where the two pieces of tape overlap. This dot will serve as your target for drilling.
  2. Place the bottle on a towel or pad and secure it firmly. Lay your folded towel or pad on a work surface that is around waist- or chest-high, such as a table or a workbench. Place your bottle flat against your pad with the taped side facing up. Make sure your bottle is stable and does not wobble or roll when you touch it. You can use some clamps or weights to hold it in place if needed.
  3. Fit your power drill with a small spear-tipped carbide or diamond bit. You will use this bit to make a starter hole, which you can then enlarge to the desired size. Slip the bottom of the shaft of the bit into the business end of your drill, pressing down on it forcefully to confirm that it is fully seated. Make sure your drill is set to the lowest speed setting and has a reverse function.
  4. Make a precise starter hole using low speed and moderate pressure. Align the pointed tip of the bit with the center of the crossed tape and hold the drill so that it forms a right angle with the surface of the glass. Squeeze the trigger of the drill lightly while pressing the bit straight into the bottle. Start at a 45-degree angle and then gradually become perpendicular to the bottle as you drill. The drilling speed and pressure should be low and moderate, and reduced toward the end to avoid chipping. Keep your drill steady and do not wobble or tilt it.
  5. Cool down the drill bit and the glass bottle with water. As you drill, you will notice that the drill bit and the glass bottle will become hot due to friction. This can cause damage to both materials if not cooled down properly. To prevent this, you need to apply some water to the drilling site every few seconds. You can use a spray bottle to mist some water on the hole, or dip your drill bit into a bowl of water periodically. The water will help to lubricate and cool down the drill bit and the glass bottle and prevent cracking.
  6. Switch to a larger drill bit and enlarge the hole to the desired size. Once you have made a starter hole with your small bit, you can switch to a larger bit that matches the size of your downstem. For example, if your downstem is 10 mm in diameter, you will need a 10 mm drill bit. Repeat steps 4 and 5 with your larger bit until you have drilled through the glass bottle completely. Be careful not to apply too much pressure or speed as you finish drilling, as this can cause chipping or cracking.
  7. Smooth and cover the hole with a file and a grommet or sealant. After drilling, you will notice that the edges of the hole are rough and sharp. This can be dangerous for your hands and your downstem. To smooth them out, you can use a 600-grit diamond file or sandpaper to gently file away any burrs or jagged edges. Then, you can insert a rubber grommet into the hole to create a tight seal between the downstem and the bottle. Alternatively, you can use some silicone sealant or epoxy glue to fill in any gaps and secure the downstem in place.

How to Use Your Glass Bong

Congratulations! You have successfully drilled a hole in a glass bottle and made your own glass bong. Now you can enjoy your herb or tobacco with this simple device. Here is how to use it:

  • Fill your glass bottle with water until it covers about half of your downstem.
  • Pack your bowl with your herb or tobacco of choice.
  • Attach your bowl to the top of your downstem.
  • Light up your herb or tobacco with a lighter or match.
  • Inhale from the mouth of the bottle while covering the hole with your finger or thumb.
  • Release your finger or thumb from the hole when you are ready to clear the smoke from the bottle.
  • Exhale and enjoy!


Making a glass bong from a glass bottle is a fun and easy DIY project that can save you money and give you a unique smoking experience. All you need is a glass bottle, a power drill, a spear-tipped carbide or diamond bit, some water, some tape, some marker, some protective gear, a downstem, a bowl, and a grommet or sealant. By following our step by step guide on how to drill a hole in a glass bottle, you can make your own glass bong in no time.

We hope you found this blog post helpful and informative. If you have any questions or comments, feel free to leave them below. Happy drilling!