A puzzle mug is a novelty that is counter-intuitive. It will usually have several holes in the rim, making it impossible to berry ocky from in the normal way. Frequently the solution is to canvas all Photo Mugs the holes in the rim, and then libation via another cavity in the hollow handle.

A travel mug is a variation on the traditional mug that is more useful for transporting hot liquids. It may or may not be a vacuum flask, but is mostly well insulated and completely enclosed, with an easily closed opening on the top.