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The Whisky Journal

Ceramic vs Porcelain vs Glass: What's Actually Better for Coffee & Tea

Ceramic, porcelain or glass — what each material actually does to your coffee or tea, and which one to reach for.
Ceramic vs Porcelain vs Glass: What's Actually Better for Coffee & Tea

Type "ceramic mug" into Google and the first things it wants to know are whether ceramic mugs are actually good to drink from, whether they're safe, and whether they're better than the alternatives. Fair questions — most people buying a mug have never thought about what it's made of beyond "not plastic." Here's the honest answer, not the marketing one.

Quick answer

For hot drinks, ceramic is the best all-rounder: it holds heat evenly, won't leach anything into your coffee, and doesn't hold onto old flavours the way some materials can. Porcelain is technically a type of ceramic, just fired hotter and thinner — better for delicate china, not for everyday use. Glass looks great and lets you see a cold brew or a latte's layers, but it's a poor insulator, so your coffee cools fast.

Material Heat retention Best for
Ceramic Good, even Everyday coffee, tea and espresso
Porcelain Good, but thin walls cool fast Formal tea service, fine china
Glass Poor Cold brew, layered lattes, iced tea
Stainless steel Excellent (insulated) Travel, commuting

Ceramic: the everyday answer

Handmade ceramic coffee cups

"Ceramic" covers a family of fired clay products, and the mugs you actually drink from are almost always stoneware — clay fired at a high enough temperature to become non-porous, then sealed with a glaze. That glaze is doing real work: it stops the clay absorbing liquid, keeps flavours from lingering between uses, and — when it's a proper food-safe glaze — creates a barrier between you and the raw material. In Australia, glazed ceramic tableware has to meet Food Standards Australia New Zealand's limits on lead and cadmium leaching, which is the actual regulatory answer to "is this safe to drink from."

The trade-off for that even heat retention is weight and fragility — a ceramic mug won't survive a drop onto tile the way a stainless steel one will. For a kitchen cup that mostly moves from shelf to table, that's a fair trade.

Porcelain: ceramic's more delicate cousin

Porcelain isn't a different material so much as a more refined version of the same one — a finer clay body, fired hotter, resulting in thinner walls and that translucent white look. It's genuinely elegant, but the thin walls that make it look delicate also mean it sheds heat faster than a thicker stoneware cup. It's the right choice for a formal tea set you bring out for guests, and a fussier one for a mug that lives on your desk.

Glass: for when you want to see the drink

Glass wins on presentation — a cold brew, a layered dirty chai or an iced tea genuinely looks better through glass than ceramic. What it loses is insulation: glass conducts heat quickly, so a hot coffee in a glass cup cools noticeably faster than the same coffee in stoneware. It's the right call for cold and layered drinks, not your daily flat white.

What about stainless steel and plastic travel mugs?

Worth a mention since they turn up in every "best mug" search: double-walled stainless steel is genuinely the best material for heat retention, full stop — it's why every keep cup and travel mug worth using is built from it. But it's a different job. A travel mug is for the commute; a ceramic cup is for the ten minutes you actually sit down and drink the thing.

Caring for handmade ceramics

Our cups are dishwasher and microwave safe, but a few habits keep a hand-glazed piece looking new for longer:

  • Hand-wash when you can. Dishwashers are fine occasionally, but repeated hot-and-cold cycling is what dulls a glaze fastest over the years.
  • Avoid the microwave for anything but reheating your own drink. It's safe, but extended high-power use can stress a glaze over time.
  • Rinse promptly after tea or coffee with tannin-heavy brews, since staining is easier to prevent than to scrub out later.

Ceramic Cups FAQs

Is ceramic microwave safe?

Yes, provided it's fully glazed with no metallic trim or paint — ours are. Avoid anything with a gold or silver rim, which can spark.

How do I stop my ceramic mug from staining?

Rinse it as soon as you're done rather than leaving tea or coffee to sit, and an occasional soak in warm water with a spoon of bicarb will lift most stains a normal wash won't.

What's the difference between stoneware and ceramic?

Stoneware is a type of ceramic — the two aren't competing categories. "Ceramic" is the umbrella term for fired clay; stoneware, earthenware and porcelain are all ceramics fired at different temperatures for different levels of density and refinement.

Can ceramic mugs go in the dishwasher?

Yes, ours are dishwasher safe. If you want the glaze to keep its shine for years rather than months, hand-washing most of the time is still the better habit.

The next step

Shop the range: Coffee Cups, Espresso Cups and Tea Cups — or see the full collection in Ceramic Cups.