Which cup can hold heat better a plastic coffee or glass cup?

A glass cup will hold heat better than a plastic coffee cup. Here's why:

* Thermal Conductivity: Glass has a higher thermal conductivity than plastic. This means that glass conducts heat more efficiently, allowing it to transfer heat from the hot coffee to your hands more quickly.

* Material Properties: Glass is a more dense and solid material than plastic. This density helps to retain heat better. Plastic, on the other hand, is a more porous material, allowing heat to escape more easily.

However, this doesn't mean glass cups are always better:

* Insulation: Plastic cups are often designed with insulation to prevent heat loss. This can make them feel warmer to hold for longer periods.

* Durability: Glass cups are more fragile than plastic cups, making them more prone to breakage.

In summary:

* If you want a cup that keeps your coffee hot for a longer period of time, a glass cup is generally better.

* If you need a durable and lightweight cup, a plastic cup might be a better choice.