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Every HYV bottle is double-wall vacuum insulated, which is the construction that actually holds temperature — there is no air gap for heat to travel through. Cold retention runs up to 24 hours and hot up to 12, depending on the model, how full the bottle is, ambient temperature and how often you open the lid.

Yes. HYV bottles are certified to BIS IS 17526:2021, India's national standard for stainless steel vacuum insulated bottles. Certification means the insulation performance and materials were tested rather than simply claimed — it is the single most reliable filter when comparing insulated bottles in India.

Bottles run 750ml (CoreFlow, FlipFlow, SlimPro, DualFlow, SnapSip, MagFlex), 1 litre (LuxeSip, LuxeFlow, DualFlow 1L, MagFlex 1L) and 2 litres (MaxFlow). Tumblers are 470ml (OpenFlow), 600ml (ChillSip, DailySip) and 1.2L (HydroFlow, HydroPro, HydroMax, HydroPop).

Food-grade 304 (18/8) stainless steel with double-wall vacuum insulation. There is no plastic liner and no BPA question — steel is inert, so it does not leach and does not carry taste between uses. Lids use a removable silicone gasket so the seal can be cleaned properly.

A sipper cap suits desk and meeting use, a wide chug cap is faster to drink from at the gym, an inbuilt straw means you never tilt the bottle, and the MagSafe magnetic lids snap to a phone mount. DualFlow gives you a chug spout and a sipper in one lid if you would rather not choose.

Yes — free shipping on all orders above ₹499, anywhere in India.