Now here's a fascinating, clever and highly devious answer to the increasingly prevalent issue of Mug Envy in the workplace.

Mug Envy, for the uninitiated, is where one has one's own mug that is frequently borrowed by other beverage drinkers in the office for reasons of style, volume or hygiene. And, as the Ten Commandments make clear, Thou Shalt Not Covet Thy Neighbour's Mug. So that's it settled, then.

At the risk of stating the obvious, the Plug Mug is a mug with a plug. A mug with a plug that one can plug out when placing the mug on the shelf in the evening, and plug in when preparing a tasty brown beverage in the morning.

Said plug is not electrical and is incapable of conducting. It is, instead, a rubber plug capable of forming a watertight barrier, thereby keeping hot drinks in and air out.

On carefully removing the plug from the mug, the mug is rendered ineffective and functionally useless, thereby denying one's colleagues the chance to purloin said mug for their own devices. The plug, in the meantime, stays hidden in one's drawer until one fancies a brew. In short, plug out to store. Plug in to imbibe. Magic.

Heretoforward, to avoid Mug Envy, get a plug mug. One simply knows it makes sense.