Simple Modern · Insulated Drink Tumblers
Simple Modern Classic Insulated Tumbler with Flip Straw Lid
Lower concern. Stainless steel core unlikely to contain PFAS.
Stainless steel tumbler with plastic lid components. No known PFAS concerns in bare stainless, but lid and straw materials lack public disclosure. Brand offers no PFAS statement.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Stainless steel tumbler, plastic lid and straw
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 tumbler body is 18/8 stainless steel, which is chemically inert and does not leach metals into beverages under normal use. The lid and straw are plastic components (typically polypropylene or copolymer), which can migrate small amounts of oligomers or residual monomers if exposed to heat or prolonged contact with acidic/alcoholic liquids. The flip mechanism and gasket materials are the main plastic exposure points; these are not typically a major leaching concern at room temperature or with cold beverages.
The brand's record and disclosure
Simple Modern does not publicly disclose material composition details, manufacturing standards, or third-party testing results on their website. The brand has not faced major recalls or safety violations on record related to this product line. They do not appear to have certified their products against BPA, phthalates, or other common plastic contaminants, nor do they engage in transparent PFAS communication. The absence of disclosure is typical for the drinkware category but represents a transparency gap.
How it compares in its category
Stainless steel tumblers with plastic lids are standard in the insulated drinkware market and represent a middle ground between all-plastic bottles (higher leaching potential) and glass with metal hardware (fragility). Simple Modern's design is common; competitors like Hydro Flask and YETI use similar construction. Brands that publish BPA-free or FDA compliance statements offer marginally better transparency, though the actual chemical exposure risk across this category is low for cold and room-temperature beverages.
If you buy it
Keep beverages at room temperature or cold; do not fill with boiling liquids, as heat accelerates plastic leaching from the lid and straw. Replace the straw and lid gasket if they show cracks, cloudiness, or discoloration, as these indicate breakdown of the plastic polymer. Hand wash the plastic components rather than placing them in the dishwasher, which may degrade seals and increase leaching. The stainless steel body is durable; focus replacement cycles on the plastic parts every 1-2 years with heavy daily use.
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 oligomer and monomer migration (lid and straw)
Polypropylene lids and straws can release trace amounts of oligomers or unreacted monomers into beverages, especially with hot liquids or prolonged contact. Risk is low at room temperature and with cold drinks but increases substantially above 60 degrees Celsius.
Gasket and seal degradation
Silicone or elastomer gaskets can degrade with repeated thermal cycling or exposure to acidic beverages, potentially releasing degradation products. Simple Modern does not disclose gasket material or durability testing.
Microplastic release from lid wear
The flip mechanism and straw attachment undergo mechanical stress with daily use; micro-fragmentation of plastic is not uncommon after 12-24 months. No testing data from the manufacturer is available to quantify this risk.
Stainless steel coating or welding contamination
18/8 stainless steel is FDA-approved for food contact. No lead, cadmium, or heavy metal leaching has been reported in this product category at the price point and construction standard.
Bacterial or mold growth in lid cavity
Flip lids with narrow seams trap moisture and are difficult to fully dry, creating a microhabitat for bacterial or mold growth if left closed when damp. This is a maintenance issue rather than a material hazard.
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.