Reduce · Insulated Drink Tumblers
Reduce Cold1 Mug Tumbler
Stainless steel core is lower concern. Plastic lid opacity unknown.
Reduce Cold1 is primarily stainless steel, a low-risk material for PFAS. Brand makes no claims about PFAS; plastic lid composition unclear without further disclosure.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Double-wall stainless steel with 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 Reduce Cold1 uses double-wall stainless steel for the beverage chamber, which is chemically inert and does not leach metals or off-gas under normal use. The plastic lid is the potential concern point: Reduce has not publicly disclosed the polymer type or whether it contains BPA, BPS, or other endocrine disruptors. Stainless steel drinkware is considered one of the safer beverage vessel categories because the material itself resists corrosion and does not degrade with hot or acidic liquids.
The brand's record and disclosure
Reduce maintains minimal public transparency regarding chemical composition or third-party testing of their drinkware. No major recalls for chemical leaching have been documented for this product line. The brand does not appear to hold independent certifications (NSF, BPA-free statements) or publish material safety data sheets for consumer products. This silence on PFAS and plastic composition is typical of mainstream drinkware brands but represents a gap in consumer disclosure standards.
How it compares in its category
Among insulated tumblers, stainless steel construction ranks favorably compared to plastic-bodied alternatives, which carry higher BPA and phthalate exposure risk. Glass-lined or glass-bodied tumblers eliminate plastic contact entirely but sacrifice durability. Reduce's double-wall design is standard in this price tier and performs similarly to brands like Hydro Flask or S'well in terms of material safety, though those brands also do not consistently disclose lid composition details.
If you buy it
Hand-wash the plastic lid rather than exposing it to hot dishwasher cycles, which can accelerate plastic degradation and potential leaching. Do not store acidic beverages (lemon water, vinegar) in the tumbler for extended periods, as even stainless steel lids may have gasket components vulnerable to corrosion. Replace the lid if it shows cracks, cloudiness, or odor after 1-2 years of heavy use. Avoid filling with boiling water if the lid will be sealed immediately, as thermal stress on the plastic can occur.
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.”
BPA and plastic additives in lid
Reduce does not publicly specify the plastic resin in the lid or confirm BPA-free status. Most mass-market tumbler lids use polypropylene or acrylic, which are lower-risk, but confirmation is absent.
Gasket and seal leachables
Double-wall lids typically contain silicone or rubber gaskets; repeated thermal cycling or exposure to hot beverages may cause minor leaching of gasket softeners, though not documented as a recall concern for Reduce.
Stainless steel corrosion from acidic drinks
The stainless steel body itself resists corrosion well, but the plastic lid's contact edges or fasteners may corrode or degrade if regularly exposed to acids (citrus, vinegar, sports drinks).
Microplastic shedding from lid wear
Repeated dishwasher cycles or scuffing may cause microscopic plastic particle release from the lid material, though not quantified for this brand and typically occurring only with heavy mechanical stress.
Off-gassing from plastic upon manufacture
New plastic lids may emit trace volatile organic compounds; rinsing the lid before first use and allowing air exposure for 24 hours minimizes this minor, temporary exposure.
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.