1 In the interests of safety and hygiene please ensure that your Thermos flask is cleaned with warm water and washing-up liquid prior to initial use.  For best results from your flask, before use, pre-fill for about 3 minutes, using either hot water for hot drinks or cold water for chilled drinks.
Extrapolating these findings to the general population, the authors estimated that 8 million elderly persons nationwide have insomnia on any given day, more than 1 million new cases of insomnia develop each year, and symptoms resolve in nearly 1.3 million elderly persons annually.
Discovery and Epidemiology Insomnia is simply difficulty sleeping. This disorder was never really discovered, as sleep problems and difficulty sleeping have been an issue since the beginning of human existence.Most people admit to having insomnia at some point in their life.A survey recorded that 95% of people admitted that they have had insomnia.his disorder was never really discovered, as sleep problems and difficulty sleeping have been an issue since the beginning of human existence. Most people admit to having insomnia at some point in their life.