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Generic 500ml Vacuum Flask Set uses double-wall vacuum insulation to maintain liquid temperatures. 304 stainless steel construction prevents rust and chemical leaching during daily use. This 500ml hot and cold bottle keeps drinks hot for 12 hours or cold for 24 hours.
Key Features
- Double-wall Vacuum: 12-hour heat retention and 24-hour cold storage. Maintains beverage temperature despite high humidity.
- 304 Stainless Steel: Food-grade alloy resists corrosion and metallic aftertaste. Withstands frequent washing and physical impact.
- Stackable Cups: Package contains three individual stainless steel drinking units. Share drinks without carrying extra glassware.
- Leak-proof Lid: Internal threaded seal prevents liquid escape during movement. Keeps bags dry during transport.
- BPA-free Materials: Internal components utilize non-toxic polymers for fluid safety. Eliminates chemical contamination risks.
Frequently Asked Questions
How long does a vacuum flask keep water hot?
This 500ml vacuum flask set maintains heat for 12 hours. Vacuum insulation minimizes thermal transfer to keep liquids near original temperatures.
Is 304 stainless steel safe for hot water?
304-grade stainless steel is food-safe and heat-resistant. It does not release toxins when filled with boiling liquids.
