Soma 25oz Glass Water Bottle
Lower concern. Glass construction avoids PFAS-prone materials, lid unspecified.
The Soma 25oz Glass Water Bottle is made of borosilicate glass, a material with no inherent PFAS risk. The lid material and any protective coatings are not publicly disclosed by Soma, and no third-party testing is available.
We flunk more products than we pass. This one earned its grade. How we grade
Material
borosilicate glass bottle with silicone/TPE lid
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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What Soma 25oz Glass Water Bottle is made of, ingredients and materials
The bottle itself is borosilicate glass, a chemically inert material that does not leach minerals, metals, or organic compounds into water under normal use or mild heating. The lid and seal are silicone and/or TPE (thermoplastic elastomer), both non-reactive polymers that do not contain BPA or bisphenols by design. Glass avoids the aluminum leaching risk seen in metal bottles and eliminates coating degradation concerns inherent in ceramic or enamel interiors.
What’s concerning
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Bacterial or mold growth in seal assembly
Silicone seals and lid crevices can harbor bacteria or mold if not dried thoroughly after use, particularly in humid environments or if the bottle is sealed while damp.
Glass breakage and sharp fragments
Borosilicate glass is durable but can shatter on hard impact; fragments may enter water or cause injury. This is inherent to glass bottles and not specific to Soma's design but relevant to this product form.
Silicone degradation from heat or UV
Extended exposure to temperatures above 60°C or direct sunlight may cause silicone to become tacky, discolored, or leach odorous compounds. Soma does not specify temperature limits for the lid material.
Unspecified lid material composition
Soma does not publicly disclose exact elastomer formulation, additives, or curing chemistry of the lid. This prevents independent assessment of potential plasticizer or filler compounds.
What’s reassuring
Bare uncoated material
Recorded as a bare, uncoated material with no surface coating or treatment.
Silicone/TPE lid leaching
Silicone and TPE are chemically stable at normal drinking temperatures and do not have established leaching profiles in published safety literature. No brand-specific testing or complaints are on record.
The full breakdown
The brand's record and disclosure
Soma is a direct-to-consumer water bottle and filtration brand owned by Republic Services. The company does not publicly disclose detailed chemical composition of its lids or publish third-party safety testing results. No recalls, contamination incidents, or regulatory actions have been established in public records. Transparency on PFAS in the lid assembly is absent from their marketing and product documentation.
How it compares in its category
Glass water bottles are among the lower concern containers in this category because glass does not leach; borosilicate is more durable than soda-lime glass for this use. Compared to metal insulated bottles (aluminum/stainless steel), glass removes corrosion and internal coating risks. Soma's silicone lid is standard for this price tier; competitor brands (Hydro Flask, S'well) use similar elastomer materials without documented safety issues specific to the lid alone.
If you buy it
Hand wash the lid and silicone seal regularly to prevent bacterial or mold growth in crevices, especially if left damp. Do not expose the silicone to prolonged heat above 60°C (140°F); avoid dishwasher if the lid cannot tolerate high temperature. Replace the silicone seal every 12-18 months if it becomes sticky, discolored, or odorous. The glass bottle itself is durable indefinitely but will break if dropped; inspect for hairline cracks after impact before refilling with hot water.
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
- Soma has made none
Formulations change between production runs, so check the current label. How we grade.
More water filters 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.