:: The functional tests have been made inserting two thermometers inside two water bottles of 1.5 Liters, once pulled off the fridge at a + 6 °C temperature, they have been exposed to an external temperature of +25 °C, one bottle inside the Kolt-To-Go bottle bag and the other one without insulation.

:: After 1 hour the bottle inside the Kolt-To-Go bottle bag reached the temperature of + 7.4 °C ( increasing only 1.4 °C) while the temperature of the bottle without the Kolt-To-Go bottle bag insulation reached the temperature of + 12.7 °C (more than twice the original temperature, increasing + 6.7 °C).

:: The best performance of Kolt-To-Go bottle bag is within the first 3 hours.

:: Moreover, the higher is the outside temperature the bigger is the difference between the two bottles with and without the Kolt-To-Go bottle bag.