Oster 10 Function Air Fryer Oven Toaster Oven Countertop Oven
Uncertain; ask Oster about the interior coating.
Oster doesn't disclose PFAS or coating details for this oven. The stainless steel exterior is lower-risk, but the interior coating stays a mystery.
The safe swap
Cosori
Cosori Smart Toaster Oven
75/100 safety
Same rubric that flunked this product. The swap earned Excellent.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Stainless steel exterior, ceramic or aluminum interior coating (unspecified)
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
What’s concerning
Non-stick, chemistry undisclosed
Advertised as non-stick but coating type is not explained.
No PFAS disclosure
The company has not publicly discussed PFAS in this product.
Category baseline
cookware is a category where PFAS exposure is more common.
Aluminum leaching (interior coating unconfirmed)
If the interior is uncoated or poorly coated aluminum, acidic foods and high heat (above 400F) can cause leaching. Oster does not specify the coating composition, so direct contact with aluminum cannot be ruled out. Confirm ceramic coating via manufacturer before purchase.
Ceramic coating degradation over time
Ceramic coatings on air fryers can chip or flake from thermal shock, mechanical wear, or defects. Once compromised, the underlying aluminum or substrate becomes exposed and may leach. No specific recalls for this Oster model exist, but the risk is inherent to the product category.
Bacterial growth in removable crumb tray or vents
Air fryer ovens accumulate grease and food particles in trays and vent areas. Poor cleaning can support mold or bacterial growth, particularly if the tray is not regularly removed and washed. This is a maintenance risk, not a material hazard.
What’s reassuring
Heavy metals
If any decorative enamel or glaze is present on the interior, lead or cadmium contamination is theoretically possible but is not documented for Oster appliances. The stainless steel exterior does not pose this risk. Modern appliance glazes rarely contain these metals due to regulatory pressure, but Oster does not publicly certify compliance.
Source: FDA ↗Volatilization of coating residues at high temperature
If the ceramic or aluminum coating contains volatile organic compounds (VOCs) or residual solvents, they could off-gas during initial use or extreme heat. Oster does not disclose curing protocols or VOC testing. Airing out the oven before first use and ensuring ventilation minimizes any theoretical risk.
The full breakdown
What it's made of and why it matters
The Oster 10 Function features a stainless steel exterior, which is chemically stable and does not leach. The interior cooking surface is listed as ceramic or aluminum, but Oster's product documentation does not specify which. Ceramic coatings are generally safer than bare aluminum, which can leach metal ions into food at high heat. The unspecified coating is the main ambiguity; if it is ceramic, risks drop significantly.
The brand's record and disclosure
Oster has not publicly disclosed PFAS testing, ingredient sourcing, or third-party safety certifications for this model. The brand does not maintain a visible chemical transparency initiative or coating specification sheet readily available to consumers. Oster is owned by Sunbeam Products, a large appliance manufacturer with no major documented recalls specific to this air fryer model for coating degradation or leaching.
How it compares in its category
Most air fryer ovens in this price tier use either ceramic-coated aluminum or non-stick coatings; Oster's ceramic-likely interior is mid-range. Premium competitors (Cosori, Instant Pot) publish coating materials and PFAS policies more openly. Budget models often use uncoated or poorly documented aluminum, making Oster competitive on transparency relative to its category, though still opaque.
If you buy it
Confirm the interior coating is ceramic, not bare aluminum, before purchase via Oster customer service. Do not exceed manufacturer temperature recommendations (typically 450F for air fryer ovens) to minimize coating stress. Hand-wash the interior gently to prevent coating chips; avoid scouring pads. Replace the unit if the coating becomes visibly scratched, peeling, or discolored, as this indicates degradation risk.
What we don’t know
- Basis
- Model estimate, 62% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Oster has made none
Formulations change between production runs, so check the current label. How we grade.
Safer alternatives in Air Fryers
Ninja
Crispi 4-in-1 Portable Glass Air Fryer Cooking System
Glass cooking vessel with stainless steel and plastic components
Thermal fracture or stress in glass cooking vessel
Limited concern
Formaldehyde / VOCs
Limited concern
Electrical hazard or heating element degradation
Limited concern
Glass cooking surface avoids nonstick coatings entirely.
⚠Risky category by default
Ninja
Crispi Pro 6-in-1 Glass Air Fryer
Glass cooking vessel with stainless steel components
Thermal shock / glass breakage risk
Limited concern
Glass construction means lower PFAS concern than typical nonstick air fryers.
⚠Risky category by default
Cosori
Smart Toaster Oven
stainless steel exterior, glass and metal interior
Thermal degradation of gaskets or seals
Limited concern
Grease accumulation and combustion byproducts
Limited concern
Glass door thermal stress and breakage
Limited concern
Lower PFAS concern, toaster ovens rarely use nonstick coatings, though brand makes no transparency statement.
⚠Risky category by default
More air fryers grades
How we score: every product runs through the same public 0–100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.