Thermos Stainless King Flask - Raspberry

It keeps hot liquids hot for up to 18 hours and cold liquids cold for up to 24 hours, thanks to its Thermos vacuum insulation technology.

No, this flask is not dishwasher safe. All components should be hand washed with warm, soapy water.

This Thermos Stainless King Flask has a capacity of 470ml.

It is generally not recommended to put carbonated beverages in vacuum insulated flasks as the pressure build-up can cause the stopper to eject forcefully or lead to leaks.

The outer lid of the flask unscrews and is designed to function as an insulated stainless steel serving cup for your convenience.

The twist-and-pour stopper allows you to pour your beverage without fully removing the stopper, simply by twisting it slightly. This helps to reduce spills and minimize heat loss.

Yes, the Thermos Stainless King Flask comes with a 5-year manufacturer's guarantee, assuring its quality and performance.

Ensure the twist-and-pour stopper and outer lid are securely tightened. Also, try pre-heating or pre-chilling the flask with hot or cold water for 5-10 minutes before adding your beverage to optimize temperature retention.

Check that the twist-and-pour stopper is properly seated and twisted to the closed position. Ensure the outer lid (serving cup) is screwed on straight and tightly. Inspect gaskets for any damage or debris that might be preventing a tight seal.

Thoroughly clean the flask with warm, soapy water and rinse multiple times. If the issue persists, try cleaning with a mixture of baking soda and water, letting it sit overnight before rinsing well.

This indicates a potential issue with the vacuum insulation seal. If the flask is new and this occurs, contact Thermos customer support as it may be covered by the 5-year guarantee.