Most Advertising Thermal mugs are built from Plastic or Stainless Steel.
Stainless steel as a Metal is very effective a retaining heat as a thermal conductor.
Heat is retained in an inner chamber surrounded by an outer chamber stopping the conduction of air around the fluid.
The absence of air in the form of a vacuum is the primary reason hot beverages retain the warmth, a lot of thermal mugs are built with double walls. The walled insulation allows for the hot air within the mug chamber to sit between the layers and retain the heat as it has nowhere to escape.
Styrofoam can also be contained with the Printed Thermal Mug build offering the same insulating properties and keeping your beverage at a steady temperature.
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The majority Plastic and Ceramic Printed Thermal Mugs are suitable for microwave use, ensure that your chosen Take Out Coffee Mug is BPA Free.
Stainless Steel and composite Mugs that may contain inner chambers and metal trims will not be suitable for microwave use.
If microwave safe options on Branded Travel Mugs is a key feature for you, check with your promotional product supplier on suitability.
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