An insulation container has an insulation material, a filter arranged to encase the insulation material, the filter of a material that prevents escape of the insulation material while allowing air to pass through, and a container arranged to encase the filter, the container being heat sealable. A printer has an ink supply, a print head arranged to receive ink from the ink supply and configured to receive electrical signals from a controller and to dispense ink in accordance with the electrical signals onto a print substrate, and an insulator to absorb heat from the print head. A method of manufacturing an insulator includes forming a filter container of a filter material, the filter material having openings small enough to prevent escape of the filter material and large enough to allow air to pass through, filling, at least partially, the filter container with an insulating material, sealing the filter container, inserting the filter container into a sealable container, applying a vacuum to the sealable container such that the vacuum is applied to the filter container as well, and sealing the sealable container.