Collection: Insulated Flasks & Vacuum Flasks

A vacuum flask features a double-wall construction with an airtight vacuum between the inner and outer walls. Because heat cannot easily transfer through a vacuum, conduction and convection are prevented, maintaining your beverage’s ideal temperature for hours.

Most Thermos® flasks keep drinks hot for 8 to 24 hours, depending on the model, capacity, and outer temperature. High-performance stainless steel vacuum insulation ensures your tea, coffee, or soup stays steaming hot throughout the day.

• 355ml – 500ml: Ideal for single servings, daily commutes, or quick trips.
• 710ml – 1 Litre: Perfect for full-day outings, picnics, or work shifts.
• 1.2 Litre+: Best for sharing, long road trips, or group outdoor adventures.

To preheat your flask, fill it with boiling water, close the lid, and let it stand for 3 to 5 minutes. Empty the water, immediately pour in your hot beverage, and secure the cap tightly to maximize heat retention.