A marvellous
invention that keeps
liquids at their starting
temperature for as long as possible. By means of an
insulated
cylinder, the liquid inside is buffered from the outside air, thus retaining its
frosty cool or
steamy heat.
Some insulated mugs are deceptively leaky, and can cause more harm than good. Always try out a new purchase before using it on the morning drive to work, unless you like being surprised by scalding coffee stains down your chest and over your crotch.