waterdrop Limited Edition Fusion Glass · Durable Borosilicate Glass Bottle Glass
Lower concern. Borosilicate glass with no coating on record.
This bottle is made of borosilicate glass with no coating disclosed. The material is not linked to PFAS, and the brand has no PFAS statement on record.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Borosilicate glass, no coating disclosed
Lab data
No public lab test
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What waterdrop Limited Edition Bottle Glass is made of, ingredients and materials
Borosilicate glass is a silica-based glass formulated with boron oxide, making it highly resistant to thermal shock and chemical leaching. Unlike soda-lime glass, borosilicate does not leach alkaline ions or heavy metals into water across normal use temperatures. The material is inert at room temperature and withstands repeated heating and cooling cycles without degradation, showing lower concern for leaching during typical use.
What’s concerning
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Thermal shock fracture (physical hazard)
Borosilicate is thermally resistant but not immune to extreme temperature swings (e.g., hot dishwasher then cold water immediately). Fractures create sharp edges and glass debris in liquids rather than chemical release.
What’s reassuring
Bare uncoated material
Recorded as a bare, uncoated material with no surface coating or treatment.
Lid gasket/seal material unknown
The product listing does not disclose lid material, gasket type, or whether it contains silicone, rubber, or plastic components that could off-gas or leach. This cannot be assessed without manufacturer specification.
Coating or surface treatment not disclosed
Waterdrop states no coating; borosilicate glass requires no protective finish. If any decorative print or labeling is present, inks are not detailed, though they do not contact the water interior.
Microplastic generation
Borosilicate glass does not shed microplastics under normal use, a key safety advantage over plastic alternatives.
Heavy metals
Borosilicate glass formulations do not leach lead, cadmium, or other heavy metals into neutral or slightly acidic water at room temperature or during normal heating.
Source, FDA ↗How is this PFAS grade calculated?
The brand's record and disclosure
Waterdrop provides minimal material transparency on this product listing; no third-party certifications (FDA, NSF, BPA-free claims) are documented in publicly available sources. The brand positions itself as a filtration-focused company rather than glassware manufacturer, and this bottle appears designed primarily as a companion vessel to their filter products. No recalls, contamination incidents, or safety controversies involving Waterdrop glass bottles have been documented in public records.
How it compares in its category
This is a water bottle, not a water filter system, but functions as filtration-adjacent storage. Borosilicate glass bottles significantly outperform plastic alternatives (polycarbonate, tritan, acrylic) in terms of leaching risk and microplastic generation. They are equivalent in safety to premium glass brands like Pyrex or Duralex, with the advantage of being reusable; however, unlike many competitor bottles, no data on impact resistance or lid gasket composition is disclosed.
If you buy it
Borosilicate glass can withstand hot liquids and dishwasher cycles without chemical release. Inspect the bottle periodically for chips or cracks, especially around the rim or base, as compromised glass poses sharp edges rather than leaching risks. Replace immediately if the glass shows visible damage. Do not use for carbonated beverages under pressure, as borosilicate is strong but not engineered for sealed carbonation storage.
What is not known about PFAS in this product?
- Basis
- Model estimate, 92% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Waterdrop has made a specific claim
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.