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The Vacuum Insulated Thermal Flask Set with 3 Cups holds 500ml of liquid inside a double-wall vacuum chamber. 304 stainless steel interior walls stabilize fluid temperatures for up to 24 hours. A three-cup sharing system provides multi-user access from a single container.
Key Features
- 3-Cup Sharing System: Three separate cups integrate into the cap and lid assembly. Three people drink at once.
- Anti-slip Matte Finish: 201 stainless steel exterior utilizes a high-friction powder coating. Prevents drops during heavy sweat.
- Heat Retention: Double-wall vacuum insulation holds liquid heat for 6 to 12 hours. Tea stays hot through work shifts.
- Food-grade Materials: BPA-free construction uses 304-grade stainless steel for internal liquid contact. Stops metallic aftertaste in water.
- Leak Protection: Threaded cap uses a high-density silicone sealing ring for closure. Stops spills inside gear bags.
Frequently Asked Questions
How long does a vacuum flask keep water hot?
Double-wall insulation keeps boiling water above 60°C for 12 hours. Frequent lid opening reduces this thermal efficiency.
Is 304 stainless steel safe for hot water?
304 stainless steel resists corrosion and heat without releasing toxic chemicals. This food-grade material prevents rust during long-term liquid storage.
