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Within the Prestige Thermopro PFSL 4 Stainless Steel Vacuum Flask 1 Ltr, a double-walled vacuum holds the liquid. Under the exterior, SS 304 grade steel forms the inner and outer body. Despite external heat, copper coating inside the vacuum layer maintains temperatures for up to 24 hours.
Key Features
- Copper Coated Insulation: Internal copper coating layered between double-wall vacuum steel. Heat stays trapped during heavy load shedding.
- SS 304 Construction: Interior and exterior surfaces use food-grade 304 stainless steel. Metal resists rust and chemical leaching.
- Temperature Retention: Liquid stability remains at 18-hours hot or 24-hours cold. Water stays chilled through the day.
- Screw Stopper Lid: Threaded seal mechanism integrates a 150ml pouring cup. Prevents leaks when stored horizontally.
- One-Year Warranty: 12-month protection against manufacturing flaws and vacuum failure. Protects against sudden seal degradation.
Frequently Asked Questions
How long does the Prestige flask keep water hot?
This model maintains high temperatures for 18 hours. The copper-coated vacuum layer minimizes thermal loss.
Is the Prestige flask made of 304 steel?
SS 304 grade steel comprises the entire body. This material is food-safe and resists corrosion.
