Muji Insulated Flask - 200 ml

It is recommended to hand wash the flask using mild detergent to maintain the integrity of the vacuum seal and the exterior finish.

No, you should avoid carbonated drinks as they can cause pressure to build up inside the sealed container, making the lid difficult to open or potentially causing leaks.

While performance varies based on ambient temperature and initial liquid temperature, the double-wall insulation is designed to keep beverages at their desired temperature for several hours.

No, the vacuum insulation prevents condensation from forming on the exterior, keeping your bag or pocket dry.

Yes, Muji products are manufactured in compliance with safety standards for food-grade contact materials.

Verify that the silicone seal is correctly seated and not pinched or twisted. Ensure the lid is screwed on straight and tightened fully.

Check that the lid is closed tightly. Pre-warming or pre-chilling the flask with water before adding the actual beverage significantly improves insulation performance.