Nice Vacuum flask 400ml water bottle are used domestically to keep beverages hot or cold for extended periods of time. Nice Vacuum flask 400ml water bottle  are also used for many purposes in industry.Nice Vacuum flask 400ml water bottle are popularly used to keep hot drinks hot and cold drinks cold.Nice Vacuum flask 400ml water bottle consist of two walls, with a vacuum in between them. This means that there is no air or other gas in the space between the walls, which prevents heat transfer by conduction or convection.Nice Vacuum flask 400ml water bottle is a safe and practical choice for your water bottle. You can enjoy a good-tasting drink at any time and place.Nice Vacuum flask 400ml water bottle double layer keeps drinks hot up to 10 hours and cold up to 24 hours.It's Perfectly all right to put Nice Vaccum Flask 400ml water bottle in a Fridge If it's empty, and it is unsealed, it will chill the liner, which will keep whatever you put in it cooler longer. If it's full of something cold, it will keep it cold until you take it out. If it's full of something hot, it will cool it slightly faster than it would cool outside the fridge