World Art Hot Cups 4oz vs Dart Container Corporation Solo Cup Polycoated Hot Paper Cups: which is safer?
Eco-Products World Art Hot Cups 4oz is the clear pick. Dart Container Corporation Solo Cup Polycoated Hot Paper Cups carries a failing PFAS grade, and we never recommend buying a failing product.
Our pick
Eco-Products
World Art Hot Cups 4oz
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossiblePLA monomer leaching (lactic acid/oligomers)
ReportedCompostability claims vs. actual infrastructure
PossibleCoating degradation and exposure over time
Solo
Dart Container Corporation Solo Cup Polycoated Hot Paper Cups
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
LikelyFluorinated polymer migration (PFAS-family)
PossiblePlastic/polymer coating degradation over time
PossibleFormaldehyde or other volatile organic compounds from adhesives
Where these two actually differ
- We flag PLA monomer leaching (lactic acid/oligomers), Compostability claims vs. actual infrastructure, Coating degradation and exposure over time and Mold or bacterial growth in wet storage on the Eco-Products and not on the Solo.
- We flag Fluorinated polymer migration (PFAS-family), Plastic/polymer coating degradation over time, Formaldehyde or other volatile organic compounds from adhesives and Microplastics from coating wear on the Solo and not on the Eco-Products.
- The Eco-Products is Plant-based compostable PLA coating where the Solo is paper with polycoated (plastic/wax) water barrier, which is most of the difference in these two grades.
- The gap is 45 points, wide enough that this is not a close call, and the Eco-Products is the one to buy.
- We are less certain about the Solo grade, at 45% confidence against 78%, because it discloses less.
Both products run through the same public rubric: materials, coatings, brand disclosure, lab findings, and recalls, plus a beyond-PFAS hazard analysis. Grades are model-based estimates, not lab tests. How grades work →
More coffee cups: see the full ranking