Igloo · Insulated Drink Tumblers
Igloo 32 oz Flip n Sip Travel Mug
Low risk; polypropylene travel mug unlikely PFAS source.
Igloo's travel mugs use polypropylene plastic, which doesn't inherently contain PFAS. No disclosure or testing data exists, but the material choice presents lower risk than coated or treated alternatives.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Polypropylene (PP) plastic with silicone seal
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
What Igloo 32 oz Flip n Sip Travel Mug is made of, ingredients and materials
The Igloo Flip n Sip is constructed from polypropylene (PP, plastic #5), a thermoplastic polymer chosen for its heat resistance up to approximately 100-120°C (212-250°F). The silicone seal is inert across normal beverage temperatures and does not leach under standard use. Polypropylene is one of the more chemically stable food-contact plastics and does not contain BPA, phthalates, or known endocrine disruptors in its base resin.
What’s concerning
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
Polypropylene degradation under heat stress
Repeated exposure to temperatures above 80°C (176°F) or direct heat (microwave, dishwasher) can cause microcracking and accelerate polymer breakdown over years. At normal use temperatures (cold to warm beverages), risk is minimal.
Silicone seal leaching and odor absorption
Food-grade silicone seals can absorb flavors and odors from beverages and may, in rare cases, shed microscopic silicone particles if degraded. No documented health hazard from silicone exposure in reusable drinkware, but worn seals should be replaced.
Bacterial growth in seal crevices
The flip-cap seal mechanism can trap moisture and beverage residue if not thoroughly cleaned. Improper drying between uses may promote mold or bacterial biofilm, particularly in warm climates. Regular disassembly and air-drying mitigates this.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
BPA & bisphenols
Polypropylene base resin does not contain BPA or phthalates by design. No recalls or testing reports indicate these chemicals are present in Igloo travel mugs of this style.
Source, FDA ↗Colorant or paint leaching
The printed graphics or colored plastic body may contain organic dyes or pigments. No documented leaching issues with Igloo drinkware, and any surface-applied decoration does not contact liquids directly in this design.
The full breakdown
The brand's record and disclosure
Igloo is a long-established cooler and drinkware manufacturer with no documented product recalls for chemical leaching or contamination related to this travel mug model. The brand has not made public statements on PFAS or other intentional additives, which is typical for mid-tier consumer goods manufacturers. No third-party certifications (e.g., NSF, FDA 177.1520 compliance statements) are prominently marketed for this specific product line, though PP itself is approved for food contact under FDA regulations.
How it compares in its category
Polypropylene travel mugs show lower concern compared to acrylic or cheaper polycarbonate alternatives in chemical stability. This product sits in the mainstream segment; it lacks premium certifications or environmental seals (e.g., cradle-to-cradle) that some competitor brands highlight. The silicone seal is a strength compared to rubber gaskets, which can degrade faster and potentially off-gas odors over time.
If you buy it
Avoid repeated exposure to boiling water or leaving hot liquids (above 80°C / 176°F) in the mug for extended periods, as stress on the plastic-silicone bond increases over years. Hand-wash rather than dishwasher to extend seal life; silicone can absorb odors and stains with repeated hot cycles. Replace the seal every 1-2 years if it shows visible wear, hardening, or if the mug no longer seals properly. Do not microwave the entire mug, though the silicone seal alone can tolerate brief microwave exposure if needed.
What we don’t know
- Basis
- Model estimate, 72% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Igloo has made none
Formulations change between production runs, so check the current label. How we grade.
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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.