Insulate example sentences

We take a system containing some quantity of water in a thermos flask or in an insulated beaker.The most familiar examples are phase transformation processes, e.g., Ice and water kept in a perfectly insulated thermos flask (no exchange of heat between its contents and the surroundings) at 273K and the atmospheric pressure are in equilibrium state and the system shows interesting characteristic features.The presence of reactants in a thermos flask or any other closed insulated vessel is an example of an isolated system.