Good to know: — Pre-heating the flask with hot water (or cooling it with cold water) makes sure the contents retain the desired temperature for longer. This procedure also minimises the risk of shattering the inner vessel when pouring in liquid. — Never use a vacuum flask in a microwave oven, an oven or a freezer. — The inner vessel is made of glass and is therefore very brittle. Never drink directly out of the flask if it has been dropped, handled without due care, or seems to leak. There may be small splinters of glass inside. — Never stir the contents with a spoon or other hard object. Ice cubes can also damage the glass inner vessel. Always place ice cubes in a freezer bag or similar before putting them into the flask. — Do not keep carbonated (fizzy) drinks in the flask. The build-up of pressure can make the lid explode with considerable
force. The same thing may happen if
sugary drinks in the flask are exposed to heat, as heat sets the fermentation process in motion. — Avoid using the flask for baby food and for drinks made with hot milk. Bacteria can develop rapidly in the heat and set the fermentation process in motion. If you do keep milk or baby food in the flask, make sure this is only for a short time, and always clean the flask carefully afterwards. — Fulfills European Standard requirements for keeping drinks hot.