Copper Still vs Stainless Steel Still: Which Is Better?
Updated Oct 1, 2026 The CopperHolic Team
Copper or stainless steel still? Copper is the better material for aroma and flavour. Stainless steel is the better material for neutral spirit, hard cleaning and low price. Neither is simply "better". The right answer depends on what you plan to distill.
We build copper stills, so read this knowing that. We have tried to give stainless its due, because for some jobs it is the right choice.
TL;DR
- Essential oils, hydrosols, floral waters: copper, for even heat and a cleaner-smelling distillate.
- Whiskey, brandy, rum and other flavour-led spirits (where licensed): copper, because it removes sulfur compounds.
- Neutral spirit at volume: stainless steel, usually with copper packing in the column.
- Lowest price and easiest cleaning: stainless steel.
- Distilled water: either works.
Copper vs stainless steel at a glance
| Factor | Copper still | Stainless steel still |
|---|---|---|
| Heat conductivity | About 400 W/m·K. Heats evenly, responds fast to the burner | About 15 W/m·K. Slower, more prone to hot spots |
| Sulfur compounds | Copper reacts with them and holds them in the still | No reaction. They pass into the distillate |
| Reactivity with the product | Reactive. Needs a clean interior before each run | Inert. Nothing added, nothing removed |
| Cleaning | Gentle: water, citric acid or vinegar. No caustics | Tolerates strong cleaners and sanitizers |
| Durability | Lasts decades. Dents can be worked out, joints re-soldered | Very tough and corrosion resistant |
| Upkeep | Tarnishes. Exterior needs polishing if you want it bright | Stays the same with little care |
| Price | Higher | Lower |
| Looks | Warm, traditional, often kept on display | Plain and functional |
What copper actually does
It spreads heat evenly
Copper conducts heat roughly 25 times better than stainless steel. In a pot full of wet plant material, that matters. Even heat means fewer scorched spots at the base, and scorching is what gives a hydrosol a burnt note. Copper also responds quickly when you turn the flame down, which makes a gentle run easier to hold.
It takes sulfur out of the vapor
Copper reacts with sulfur compounds in hot vapor and holds them on the inside wall of the still. In spirits this is well documented. It is the reason whisky and brandy makers have kept copper in the vapor path for centuries, and why stainless spirit stills often have copper added somewhere.
Plants carry sulfur compounds too. Many hydrosol makers prefer copper for this reason: the fresh distillate tends to smell cleaner, with less of the cooked "still note" that otherwise takes time to fade.
What stainless steel does better
It is inert
Stainless does not react with anything in the pot. Some essential oil distillers choose it for exactly that reason. They want the oil as the plant made it, with nothing altered. That is a fair position. Functionally, both metals will distill an essential oil.
It is easier to clean
Stainless tolerates caustic cleaners and hard scrubbing. Copper does not. If you run several batches a day and need fast turnaround, stainless saves real time.
It costs less
Stainless stills are cheaper to make, and the budget end of the market is mostly stainless. A well-made stainless still is a better buy than a thin, badly soldered copper one.
The honest downsides of copper
- It needs care. Rinse after every run and do a citric acid or vinegar clean when the inside dulls. Our cleaning guide covers the routine.
- A neglected still can tint the distillate. Green or blue deposits inside the still are copper salts. Clean them out before you run. A clean copper still does not have this problem.
- It tarnishes. The outside darkens with heat and time. Many owners like the patina. If you want it bright, you will be polishing.
- It costs more. Copper is the more expensive metal and it is worked by hand.
Which should you choose, by what you make
| You want to make | Better material | Why |
|---|---|---|
| Hydrosols and floral waters | Copper | Even heat, cleaner fresh aroma |
| Essential oils | Copper for most home distillers; stainless if you want a fully inert path | Both work. Copper is gentler on heat, stainless changes nothing |
| Distilled water | Either | Water is not demanding |
| Flavour-led spirits, where licensed | Copper | Sulfur removal |
| Neutral spirit, where licensed | Stainless column with copper packing | Efficiency and easy cleaning |
| Several batches a day | Stainless | Fast, harsh cleaning between runs |
A note on spirits: distilling alcohol at home without federal permits is illegal in the US, and some states restrict still ownership. Our US legal guide has the details.
How to spot a good copper still
If you choose copper, the build matters more than the metal. Look for a stated wall thickness of about 1 mm, lead-free solder, and a listed weight. What gauge copper for a still explains how to read those numbers, and how long a copper still lasts covers what wears and what does not.
Be careful with listings titled "copper still" at very low prices. Many are stainless pots with a copper coil. Read the materials line for the pot itself, not just the tubing.
FAQ
Is a copper still better than stainless steel for essential oils?
Both will distill essential oils. Copper heats more evenly and many makers find the hydrosol smells cleaner. Stainless is inert and easier to clean. For home-scale aromatic work, most people choose copper. See our guide to copper stills for essential oils.
Why are stills made of copper?
Two reasons. Copper conducts heat far better than steel, and it reacts with sulfur compounds in the vapor so they stay in the still.
Can I use a stainless steel still with a copper coil?
Yes, and many budget stills are built that way. You get some copper contact in the condenser. You do not get copper's even heating in the pot, where plant material sits.
Does copper get into the distillate?
A clean copper still adds no visible tint. Green or blue deposits mean the still needs cleaning before the next run.
Which lasts longer?
Both last decades when cared for. Stainless shrugs off neglect. Copper needs a little routine but can be repaired by hand if it is ever damaged.
If copper suits what you make, our copper alembic stills come in three sizes: 5 litre, 5 gallon and 10 gallon. Each is hand-hammered from 1.1 mm copper and arrives assembled.