Thermal mugs also known as travel mugs are designed to keep your drinks hot on the go. They are silver colored on the inside and contain an insulator that locks in the heat that would have rather been lost from your drink making it stay hotter for longer.
Thermal mugs come with their own lids that are designed to release the drink from a small sealable hole and thus no need for removing the whole lid just to take a sip. This ensures minimal heat loss from your drink.
