How to Make a Glass Spoon Pipe

What is a glass spoon pipe?

The anatomy of a spoon pipe has four parts: the bowl, which holds the material and is the widest part of the piece; the neck, the narrower tube connecting bowl to mouthpiece; the mouthpiece, the open end you draw from; and the carb hole, a small opening punched through the side of the bowl that you cover and release to control airflow. Every element of a spoon is functional — nothing decorative, nothing wasted.

That simplicity is exactly why it's the ideal first project. Each part of the spoon teaches a distinct skill: the bowl demands gathering and wall-control; the neck demands pulling and symmetry; the carb demands heat targeting and precision. A typical finished spoon is 3.5–4.5 inches overall, small enough to hold in one hand, and robust enough to use daily.

Once you can make a clean, even spoon with a properly shaped carb, you have the foundation for every more complex form — Sherlocks, bubblers, hammers, and water pipes all share the same underlying moves.

What glass and tools do you need to make a spoon pipe?

Here is what each tool does and why it matters:

• Borosilicate tubing (25mm × 4mm wall) — The standard starting size for spoon bowls. Clear COE 33 tubing, cut to 6–8 inches, gives you enough material to form a bowl at one end and pull a mouthpiece from the other. Use 32mm if you want a larger bowl.
• Oxygen-propane torch — A surface-mix torch like a Bethlehem Alpha, GTT Bobcat, or Nortel Minor is the standard choice. Boro requires an oxygen-fed flame — a propane-only torch won't get hot enough. For full guidance on choosing your first torch, see our torch buying guide.
• Graphite paddle or marver — Used to support and shape the outside of the bowl while you work the glass. Graphite doesn't stick to hot glass and can withstand direct flame contact.
• Tungsten pick — For opening the carb hole and fine-shaping the interior of the bowl. Tungsten has an extremely high melting point and holds up to repeated contact with molten boro.
• Glass nippers — For scoring and breaking the tube to length before you begin working.
• Didymium safety glasses — Non-negotiable. They block the intense sodium flare from the flame so you can actually see the glass clearly while you work. Never light the torch without them. See our eyewear guide for the full breakdown of lens options.
• Annealing kiln — Any finished piece must go straight from the torch into a preheated kiln. Without controlled cooling, hidden stress will crack the pipe hours or days after you finish it. See our equipment guide for kiln recommendations at every budget.
• Fine silver (.999+) — Optional but recommended even for your first piece. A small amount is all you need to fume color into the finished pipe — a few centimeters of fine silver wire or a small sheet fragment.

How do you form the bowl of a spoon pipe?

Start with a clean piece of 25mm boro tube, 6–8 inches long. Before heating anything, decide which end becomes the bowl and which becomes the mouthpiece. The bowl end will be worked heavily — the mouthpiece end gets a lighter treatment — so it's easier to think through the shape before you pick up the tube.

Bring the bowl end into the flame at a shallow angle, rotating steadily. You're not trying to melt the end shut — you're heating the glass evenly around the circumference until it glows a consistent, bright orange. When the rim starts to move, the glass is ready to gather. A consistent glow all the way around the tube is the signal to start shaping.

Hold the graphite paddle flat below the bowl end and gently press the softened glass downward and inward, deepening the depression while you continue to rotate. The key is working in short increments: heat for a few seconds, shape a little, reheat, shape a little more. Trying to do it all in one long heat leads to over-softened glass that collapses rather than holds its shape.

Wall thickness is the thing to watch. As you deepen the bowl, the walls thin out. Aim for consistent thickness across the bowl — too thin anywhere and you'll get a pinhole or a collapse. A typical finished bowl on a spoon is roughly 2–3mm deep and about 18–22mm across the opening.

How do you open the carb hole?

Positioning matters more than most beginners expect. The carb goes on the left side of the bowl when you hold the pipe with the mouthpiece pointing toward you — this is the convention that makes the pipe natural to hold and use with your left thumb. If you put the carb on the right side or the top of the bowl, the finished pipe will feel wrong in the hand.

Target a spot roughly centered on the left side of the bowl wall. Heat that area with a tighter, more focused part of the flame — you want to soften a small region without reheating the whole bowl. When the target spot glows orange, press the tip of your tungsten pick through from the outside. The glass will push inward rather than outward, which is correct.

Once you're through, pull the pick out and reheat the area. Use the pick tip to widen the opening slightly and smooth the interior edge. A carb that's too small is frustrating to use — aim for 3–4mm across. A carb that's too large will cause the pipe to draw differently, so err on the smaller side and open it incrementally. Finally, run a flame pass across the outside edge of the hole to fire-polish any roughness smooth.

How do you shape the mouthpiece?

The mouthpiece end of the tube doesn't need to gather — it needs to narrow. The technique here is a controlled pull: heat a short section of the tube near the end until it softens and becomes pliable, then hold both sides and draw them apart steadily. The glass stretches and the diameter reduces. Done in small increments, you can taper the tube from 25mm down to the 8–10mm opening that makes a comfortable mouthpiece.

The most common mistake is pulling too fast or unevenly — one hand moves faster than the other, or you pull before the glass is fully soft, and the resulting neck is crooked or asymmetrical. If that happens, reheat the problem section gently and use the flame itself to straighten it, or carefully heat and re-pull in the opposite direction. Patience here pays off in a pipe that feels balanced in the hand.

Once you've shaped the neck and mouthpiece to the diameter you want, you'll need to open the end. Score the tube at the right length with your nippers and snap it clean, then flame-polish the cut edge by briefly introducing it to the flame and rotating — the edge will round and seal slightly. Finish with a final pass to round the rim of the opening so it's comfortable against the lip.

How do you fume a spoon pipe for color?

Fuming is done after the pipe is fully shaped but before it goes into the kiln. Keep the pipe warm — not scorching, but above room temperature — so the glass is receptive to the metal vapor. Hold the silver in a pair of tungsten tweezers and bring it into the lower edge of the flame just above the bowl opening. The silver will vaporize quickly, releasing a faint haze of metallic vapor that coats the inside of the bowl and tube.

The color doesn't appear on the glass immediately — the metallic layer is nearly invisible while the glass is hot. Once the piece cools, the thin silver deposit creates an iridescent effect: blues, purples, and yellows that shift depending on the angle of light. The inside of the bowl typically shows the richest color, and a pipe that has been used will develop deeper, more saturated tones as residue builds on top of the silver layer.

Silver is the standard for first fuming because the colors are the most dramatic and the vaporization is predictable. Gold is an alternative that creates pinks and greens — a warmer palette. You can combine both metals, silver first and then a light gold pass, to layer colors. The full technique is covered in the silver and gold fuming guide, and the specific metals and grades to source are in our fuming metals guide.

Why and how do you anneal a finished spoon pipe?

As you work boro at the torch, different parts of the piece heat and cool at different rates, building invisible internal stress. This stress is a physical reality in all worked glass, and it's not always visible — a pipe can look perfectly fine and then crack overnight on the shelf because of internal tension that was never relieved. Annealing gives the glass time to equalize that stress before it's locked in by cooling.

The process: have your kiln preheated to around 1050°F (560°C) before you start your session. The moment you finish fuming, set the pipe in the kiln. Hold the temperature for 15–30 minutes. Then program a slow controlled descent — most small kilns can be set to ramp down at 50–100°F per hour — all the way to room temperature. Don't rush it. A typical anneal cycle for a spoon pipe takes 4–6 hours total, most of which is just the kiln cooling on its own schedule.

For full step-by-step annealing instructions and troubleshooting, see the annealing guide. If you're still choosing a kiln, our kiln buying guide for pipe makers covers the options at every price point.

Common spoon pipe problems and how to fix them

Every glassblower runs into these problems on early pieces. Here's what's actually happening and how to correct it:

• Bowl collapse: The glass got too soft before you shaped it, or the walls thinned out too much during shaping. Prevention: shorter heating passes, use the graphite paddle to support the outside as you work. If you catch a collapse starting, pull the glass away from the flame immediately and let it firm up before reheating.
• Lopsided bowl: Uneven rotation during heating — one side of the tube spent more time in the hottest part of the flame. The fix is consistent rotation. Keep the tube moving at an even speed the entire time it's in the flame, not just occasionally.
• Crooked or uneven neck: One hand moved faster during the pull, or you started pulling before the glass was uniformly soft. Reheat the crooked section gently and either work it with the flame to straighten, or do a gentle opposing pull to correct the geometry.
• Carb too small: Ream the hole with the tip of your tungsten pick while reheating the area in short passes. Work incrementally — it's much easier to make a carb larger than to make it smaller.
• Dull or absent fuming color: Either the silver didn't vaporize completely, the glass was too cold to accept the vapor, or the layer was too thin. A second fuming pass over a warm pipe will build the layer. Make sure the silver is actually vaporizing in the flame before you pass it over the bowl.
• Crack in the finished piece: Almost always a failure to anneal, or annealing at too low a temperature, or cooling too fast. If a piece survives without cracking for 48 hours, it's structurally sound — most thermal-stress cracks happen within the first day.