Thermal Performance Test: The Summit Range Flask vs. The Rest
When the power drops or you are miles from the nearest plug point, a lukewarm cup of coffee just doesn't cut it. At Avilo, our promise is "Built for Life Beyond the Grid," and we comitted that our 750ml Summit Range Flask keeps liquids hot for 8+ hours.
But we didn't just want to make a claim—we wanted to prove it.
We put our double-walled 304 stainless steel flask head-to-head against a well-known benchmark brand and a standard ceramic mug in a strict 16-hour heat retention test. Here is exactly how the Summit Range Flask performed.
The Results: Full Day Heat Retention
The data clearly demonstrates the superior insulating power of the Summit Range Flask over an extended period.
- The 3-Hour Mark (The Mug Fades): While a standard ceramic coffee mug plummets to a room temperature of 25°C within just three hours, both insulated flasks retain extreme heat.
- The 6.5-Hour Mark: The benchmark brand temperature dropped down to 60°C, while the Summit Range Flask holds incredibly strong at 70°C.
- The 13.5-Hour Drop-Off: At this critical stage—well into a full day of hiking—the competitor's flask reaches a lukewarm 45°C. In contrast, the Avilo flask maintains a highly drinkable 58°C.
- The 16-Hour Finish: Pushing well past our 8-hour commitment, the Summit Range Flask concludes the full 16-hour test at a solid 53°C, while the competitor fades to roughly 40°C.
How the Test Was Conducted
To ensure accuracy and transparency, the test was conducted using a strict, standardized protocol:
- Preparation & Pre-Heating: Water was brought to a rolling boil. Both flasks were filled and left to pre-heat for exactly 2 minutes. This crucial step primes the stainless steel interior, minimizing the initial thermal shock when the final liquid is added. The pre-heating water was then emptied.
- The Fill & Baseline Reading: Fresh boiling water was immediately poured into both flasks, filling them to their maximum capacity. The first temperature reading (Hour 0) was taken instantly.
- Starting Temperature Factor: The baseline reading for both flasks was recorded at 95°C rather than 100°C. This accounts for the natural, unavoidable heat loss that occurs during the pouring process and the brief air exposure before the lids are secured.
- Controlled Monitoring: Throughout the testing period, the flasks were opened only at specific intervals to insert a calibrated thermometer. Following each reading, the lids were swiftly closed to prevent unnecessary heat escape.
Testing Conditions & Assumptions
- Ambient Environment: Testing was conducted in a controlled, steady ambient temperature of 25°C.
- Maximum Capacity: Each flask was filled completely to the brim. This minimizes internal air volume, which can act as a heat sink and accelerate heat loss.
- Minimal Exposure: Lids were kept securely closed for the duration of the test, aside from the brief moments required to record temperature readings.
Note: Real-world results may vary slightly depending on external environmental factors, the frequency of opening, and the volume of liquid remaining inside the flask.
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