Thermos Stainless King Food Flask - Blue

It keeps food hot for up to 9 hours and cold for up to 14 hours, thanks to its double wall vacuum insulation.

While durable, hand washing with warm, soapy water is recommended for all components to ensure the best performance and longevity of the flask and its insulation properties.

This model has a capacity of 0.47 Litres, which is suitable for individual meal portions.

It is generally not recommended to store carbonated beverages in vacuum-insulated containers as pressure build-up can cause the lid to eject forcibly or make it difficult to open.

Yes, the double wall vacuum insulation ensures the exterior remains cool to the touch even when filled with hot food, and sweat-proof with cold food.

The folding stainless steel spoon should be washed with warm, soapy water and dried completely before being stored back into its compartment.

Ensure the lid is screwed on tightly. Pre-heating or pre-chilling the flask with hot or cold water for 5-10 minutes before adding food significantly improves temperature retention. Also, try to fill the flask as much as possible, as a fuller flask retains temperature better than a partially filled one.

Ensure the lid threads are clean and free of food debris. If using hot food, a vacuum seal can sometimes form; try gently wiggling the lid or running the top part of the flask under warm water for a few seconds to equalize pressure. For cold foods, condensation might make it sticky, ensure hands are dry for better grip.

Check that the lid is securely tightened and that the silicone seal (if present, often in the lid) is properly seated and free of tears or debris. Avoid overfilling the flask beyond the neck.

Ensure the spoon's hinge mechanism is clean and free of food particles. Rinse thoroughly with warm water. If still stiff, a tiny drop of food-grade oil can sometimes help, but generally, regular cleaning should keep it smooth.