Simple Modern · Insulated Drink Tumblers
Simple Modern Trek Prism Lidded Tumbler
Lower concern. No PFAS-prone materials identified in standard tumblers.
Simple Modern Trek tumblers use stainless steel bodies, a common PFAS-low material. Brand does not disclose PFAS stance. No third-party testing publicly available.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Stainless steel, plastic lid
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
Category baseline
other is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
The full breakdown
What it's made of and why it matters
The Trek Prism uses food-grade stainless steel (typically 18/8 or 304 grade) for the main vessel, which is chemically inert and does not leach metals into beverages under normal use. The lid is injection-molded plastic, most likely polypropylene (PP) or a similar polyolefin, which is considered low-migration for cold and warm liquids. Stainless steel tumblers avoid the aluminum leaching risk present in uncoated aluminum drinkware and the Teflon-type coating fume risk of non-stick coatings.
The brand's record and disclosure
Simple Modern has not made explicit public statements about PFAS testing or chemical safety standards for this product line. The brand does not appear in major consumer safety controversies or FDA/CPSC recall databases for this model. Without published third-party certifications (e.g., NSF, Cradle to Cradle), there is no independent verification of plastic component sourcing, though the use of commodity plastics in lids is standard industry practice.
How it compares in its category
Stainless steel tumblers like this are chemically safer than ceramic-coated alternatives (which may contain lead in decorative glazes) and aluminum drinkware without protective barriers. Compared to glass or silicone-only options, the plastic lid introduces a minor chemical exposure vector, but PP is one of the lower-concern food-contact plastics. This product sits in the middle-to-safe range for drinkware, with no material red flags relative to mass-market competitors.
If you buy it
Avoid prolonged storage of acidic beverages (lemon water, vinegar) in the stainless steel vessel, as acidic conditions can theoretically promote metal ion release, though this is rare with high-grade stainless. Hand-wash the plastic lid rather than dishwasher to minimize thermal stress and potential plastic degradation over years of use. Do not use for boiling liquids; lids are typically rated for warm (not hot) beverages. Replace the lid if visible cracks, discoloration, or odor develops, as degraded plastic may increase leaching risk.
Beyond PFAS: other things we checked
Established hazard classes for this product type, assessed from public information. These never change the PFAS grade; a Likely flag caps the Verdict at “Buy with care.”
Plastic lid leaching (BPA/phthalates)
No BPA or phthalate content has been documented for Simple Modern lids; industry standard is PP or polyethylene, which do not intentionally contain these additives. Risk is minimal at room temperature but increases if lid contacts very hot liquids repeatedly.
Metal leaching from stainless steel
Food-grade 18/8 stainless steel is stable and does not leach nickel or chromium into neutral or mildly basic beverages. Only prolonged contact with strong acids or salt solutions at high temperatures poses theoretical risk, which is uncommon in normal daily drinking.
Microplastics from lid degradation
If the plastic lid is repeatedly heated (dishwasher cycles, hot liquids) or physically cracked, degradation may release small particles. This is a usage-dependent hazard, not an inherent defect, and can be mitigated by hand-washing and timely replacement.
Bacterial growth in seals or crevices
Like all lidded drinkware, trapped moisture in threads or gasket areas can promote mold or bacterial growth if not cleaned promptly and dried thoroughly. This is a maintenance issue, not a chemical hazard.
Lid adhesive or printing inks
No recalls or documented issues with adhesive or ink toxicity on Simple Modern lids; injection-molded plastic typically requires no adhesives, and printing is typically food-contact-safe ink. Specific formulation details are not publicly available.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 72% confidence. It is not a lab result.
No independent PFAS lab test is on record for this exact product. A lab test could move the score in either direction.
The brand has not made a specific, verifiable PFAS-free statement, so part of this score reflects that missing disclosure rather than a confirmed material.
Formulations and coatings change between production runs. Always check the current label before buying.
Safer alternatives in Insulated Drink Tumblers
Reduce
Halo Tumbler
Stainless steel and plastic lid
Lower concern tumbler; stainless steel is inherently PFAS-safe.
✓Naturally PFAS-free material
Cuppa
To Go Tumbler
Stainless steel with plastic lid
Lower concern. Standard tumbler with no known PFAS risks.
✓Naturally PFAS-free material
Klean Kanteen
Steel Pint
18/8 stainless steel, bare metal
Lower PFAS concern. Bare stainless steel container, no coatings.
✓Bare metal or glass, no coating at all
More insulated drink tumblers 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.