Ello · Insulated Drink Tumblers
Ello Beacon Vacuum Insulated Stainless Steel Tumbler
Lower concern, as bare stainless steel and glass have minimal PFAS risk.
Ello Beacon uses stainless steel and glass with vacuum insulation, inherently low-risk materials. No surface coatings or water-resistant treatments typical of PFAS use are present.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Stainless steel and glass, vacuum insulated
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
What Ello Beacon Vacuum Insulated Stainless is made of, ingredients and materials
The Ello Beacon uses food-grade stainless steel (outer and inner walls) with a vacuum insulation layer between them, plus glass or stainless steel internal contact surfaces depending on model variant. Stainless steel itself does not off-gas, leach heavy metals under normal use, or degrade into microplastics. The vacuum layer eliminates the need for foam or chemical insulators that might emit volatile organics. This material profile avoids nearly all hazards associated with coated cookware, plastic food-contact surfaces, or chemically-treated textiles.
What’s concerning
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Bacterial growth in lid gaskets and seals
Silicone or rubber gaskets in the lid can harbor mold and bacterial biofilm if not disassembled and dried thoroughly after use. This is a maintenance issue, not a material toxicity issue, but common in vacuum-insulated tumblers.
Vacuum seal degradation and loss of insulation
Over time, the vacuum seal can fail due to thermal cycling or impacts, though this is a durability issue rather than a safety hazard. A failed seal will not release chemicals but will reduce insulation performance.
What’s reassuring
Bare uncoated material
Recorded as a bare, uncoated material with no surface coating or treatment.
Nickel leaching from stainless steel
Food-grade stainless steel (typically 304 or 316) leaches negligible nickel under normal cold or warm beverage conditions. No published studies or recalls document nickel migration from Ello tumblers; risk is minimal compared to low-quality stainless alloys.
Formaldehyde / VOCs
Stainless steel and glass do not require formaldehyde-releasing adhesives or coatings. The vacuum assembly may use minimal adhesives, but no off-gassing or VOC complaints are on record for this product line.
Source, ATSDR ↗Heavy metals
The Beacon is typically sold with minimal exterior printing or embossing. No cadmium, lead, or antimony migration from decoration is reported; this is a low-risk area for this product.
Source, FDA ↗The full breakdown
The brand's record and disclosure
Ello (owned by Contigo, part of the Newell Brands portfolio) does not publicly disclose PFAS testing or voluntary PFAS avoidance commitments. However, no recalls or safety controversies related to the Beacon tumbler or Ello drinkware are on record with the CPSC or major safety databases. The brand markets the product as BPA-free but does not provide third-party certification or material safety datasheets for independent verification.
How it compares in its category
Stainless steel and glass are materials not linked to PFAS concerns in drinkware applications. Most competitors (Hydro Flask, YETI, S'well) use similar core materials but may include silicone grip sleeves or rubber seals that could harbor bacteria if not cleaned regularly. The Beacon avoids non-essential coatings and adhesives, positioning it favorably on durability and chemical simplicity compared to plastic-heavy or heavily insulated plastic models.
If you buy it
Hand-wash the lid gaskets and seals weekly to prevent mold growth in the vacuum chamber seal zone. Do not expose to sustained temperatures above 100C (212F), as extreme heat can damage seals but will not compromise the stainless steel itself. Replace gaskets or lids if they crack, separate, or smell of mold after cleaning. Check the threads and vacuum seal annually; if insulation fails (tumbler becomes warm to touch with cold liquid inside), the vacuum layer has breached and the product should be retired.
What we don’t know
- Basis
- Model estimate, 78% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Ello has made none
Formulations change between production runs, so check the current label. How we grade.
Better-graded alternatives in Insulated Drink Tumblers
Klean Kanteen
20oz TKWide with Café Cap, Tofu
- Stainless steel bottle, stainless steel cap
- The brand calls it PFAS-free, which we have not verified
- Powder-coat cap degradation over time
3 hazards checked on this product. See all of them.
Klean Kanteen
16oz Rise Tumbler
- Stainless steel body, powder-coat finish
- The brand calls it PFAS-free, which we have not verified
- Powder-coat finish degradation
3 hazards checked on this product. See all of them.
Klean Kanteen
Insulated TKWide Cap
- Stainless steel bottle, plastic cap and silicone gasket
- The brand calls it PFAS-free, which we have not verified
- Silicone gasket degradation and leaching
3 hazards checked on this product. See all of them.
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.