AUTHORITY·6 min read·Updated May 2026
⚡ Quick Answer
BIS IS 17526:2021 is the Indian mandatory standard for vacuum-insulated drinkware, administered by the Bureau of Indian Standards. It tests thermal performance, leakproofness under pressure, material safety (heavy metal migration), and mechanical durability through accredited independent laboratories — not self-declaration by the manufacturer.
What BIS IS 17526:2021 Tests
Thermal
Cold & hot retention verified
Leakproof
Pressure tested under inversion
Material
Heavy metal migration from steel
Mechanical
Drop, impact, durability tests
What IS 17526:2021 Covers — In Detail
| Test Category |
What is Checked |
Why It Matters |
| Thermal performance |
Cold retention at 4°C reference; hot at 90°C reference |
Verifies stated insulation claims are actually achieved |
| Leakproofness |
Bottle inverted, placed on its side, pressured — zero leakage required |
Confirms lid seal works under real-world use conditions |
| Material safety |
Heavy metal migration from steel into acidic/neutral solution |
Confirms no harmful leaching from interior surfaces |
| Mechanical durability |
Drop test, lid torque, impact resistance |
Confirms the bottle survives normal use without compromising safety |
| Marking requirements |
Proper labelling including manufacturer info, capacity, material grade |
Consumer transparency requirement |
Who Grants BIS Certification?
The Bureau of Indian Standards (BIS) grants IS 17526:2021 certification through licensed testing laboratories. Manufacturers apply for certification, their products are tested independently by BIS-recognized labs, and if the product meets all test criteria, the BIS certification mark is granted. The certificate must be renewed periodically, and BIS can conduct market surveillance checks.
How to Verify BIS Certification
Verify a product's BIS certification at bis.gov.in by searching for the product category and manufacturer. The BIS certification mark on a product should be accompanied by the licence number, which can be cross-referenced against BIS's public register.
HYV LuxeSip — BIS certified
HYV DualFlow 1L — full range
HYV HydroMax — tumblers certified
💡 On Non-Certified Claims
Many products in the Indian market make thermal performance claims without BIS IS 17526:2021 certification. Without independent testing, a '24-hour cold' claim is marketing, not engineering. BIS certification is the only way to verify the claim was achieved under standardised conditions.
Frequently Asked Questions
What is BIS IS 17526:2021?
The mandatory Indian standard for vacuum-insulated drinkware, administered by the Bureau of Indian Standards. It tests thermal performance, leakproofness, material safety, and mechanical durability through accredited independent laboratories.
Is BIS certification mandatory for water bottles in India?
BIS IS 17526:2021 is the applicable standard for vacuum-insulated drinkware. All HYV bottles carry this certification, providing independent verification of safety and performance claims.
How do I check if a water bottle is BIS certified?
Check the product packaging for the BIS mark and licence number, then verify at bis.gov.in using the manufacturer name and product category.
Does BIS IS 17526 apply to all water bottles?
The standard applies specifically to vacuum-insulated drinkware. Non-insulated or single-wall bottles may fall under different or no mandatory standards.
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