What materials keep coffee warmer?

Ceramic mugs and cups are made of materials such as porcelain or stoneware. These materials have low thermal conductivity, which means they do not transfer heat well. This keeps the coffee warmer for a longer period.

Stainless Steel:

Stainless steel is another material that is commonly used to make coffee mugs and travel cups. Stainless steel has a higher thermal conductivity than ceramics, but it still retains heat quite well. Additionally, stainless steel is durable, easy to clean, and resistant to rust and corrosion.

Glass:

Glass is a material that is often used to make coffee mugs and carafes. Glass is not as good at retaining heat as ceramics or stainless steel, but it still provides some insulation. Glass is also clear, which allows you to see the color and clarity of your coffee.

Other Materials:

Some other materials that are sometimes used to make coffee mugs and cups include plastic, wood, and silicone. These materials generally do not retain heat as well as ceramics, stainless steel, or glass, but they can be lightweight, durable, or have other desirable properties.