Not all pottery and ceramics are safe for food—even beautiful, handmade pieces can leach toxins if they're glazed or fired incorrectly. Before you buy a handcrafted mug, bowl, or plate to eat or drink from, you need to know what questions to ask and what red flags to watch for. This guide walks you through the essentials of food-safe pottery so you can shop with confidence.
The Core Issue: What Makes Pottery Unsafe
Glazes are the primary concern. Some glazes contain lead, cadmium, or other heavy metals that can seep into food and liquids, especially acidic ones like citrus juice or tomato sauce. The problem isn't always visible—a beautiful glaze can look completely safe while being hazardous. The firing temperature and glaze ingredients are what matter, not appearance.
Home studio potters and even some small commercial makers may use older glaze recipes or non-food-grade materials without realizing the risk. Temperature and duration of the kiln firing also affect whether glazes fully mature and seal properly.
What to Ask the Maker
Before purchasing, contact the potter directly with these specific questions:
- Is this piece food-safe? This is your first filter. A responsible maker will give you a clear yes or no.
- What glaze did you use? Ask for the brand name or recipe. Food-safe glazes are labeled as such by manufacturers like Laguna, Amaco, or Spectrum.
- What temperature did you fire it to? Glazes need to reach cone 6 (2232°F) or higher to fully mature. Cone 04–05 (lower-temperature) firings are often less reliable for food safety.
- Has it been tested? Some makers test their glazes for lead and cadmium using home test kits (around $10–20 each) or send samples to labs. Ask if they have results.
- Is the interior glazed? Food-contact surfaces must be glazed. Any raw, unglazed clay will absorb liquids and harbor bacteria.
- Are there any disclaimers? If the maker says "not recommended for hot liquids" or "decorative only," that's your answer—don't use it for food.
Red Flags to Watch
Steer clear if a maker:
- Refuses to answer your questions or seems uncertain about their processes
- Uses vintage or thrifted glazes without testing them
- Fires at low temperatures (cone 04 or below) exclusively
- Glazes only the outside of a bowl or cup
- Sells at very low prices (under $15–20 for hand-thrown pieces), which sometimes correlates with corner-cutting on safety
- Has no maker's mark, business presence, or way to contact them directly
Handmade doesn't automatically mean unsafe, but transparency does indicate professionalism and care.
How to Verify Food Safety
If the maker claims their work is food-safe, ask for evidence:
- Glaze documentation: Request the product name and safety sheet from the glaze manufacturer. Reputable makers keep these on file.
- Lab testing: Some potters send glazed test tiles to professional labs for lead and cadmium analysis. Results cost $50–150 per test but provide certainty.
- Home test kits: Lead test strips (available on Amazon or hardware stores for $8–20) aren't foolproof but can catch obvious problems.
- Firing logs: Professional makers keep records of kiln temperatures and dates. This shows consistency.
Price and Timeline Expectations
Food-safe handmade pottery typically costs $25–$100+ per piece, depending on size, complexity, and the maker's experience. Custom orders or pieces from established artisans run higher. If someone's selling food-safe hand-thrown bowls for $8 each, something's off.
Custom pieces take 4–8 weeks from order to completion, including kiln firing and cooling time. Rush orders are possible but cost more.
Finding Trusted Makers
Look for potters with clear shop policies, detailed product descriptions that mention food safety explicitly, and reviews mentioning durability or daily use. Mercoly helps you compare and find trusted pottery and ceramics providers in one place, so you can review their practices and customer feedback side-by-side.
Check Instagram and websites for maker bios, studio photos, and testimonials. Makers who are transparent about their process are the safest bet.
Frequently Asked Questions
Q: Can I use a test kit at home to check for lead in glazes? Lead test strips work but aren't definitive—they might miss low-level contamination. Lab testing is more reliable, though pricier.
Q: Is food-safe pottery dishwasher-safe? It depends on the glaze durability and firing quality; ask the maker. Many handmade pieces are safer hand-washed to preserve the glaze.
Q: What if I already own handmade pottery I'm unsure about? Stop using it for food, especially if you don't know the glaze origin. A home lead test can give you peace of mind, or you can send a sample to a lab if concerned.
Start your search by asking makers the right questions—it takes five minutes and could save your health.