You can’t choose your office mates, but you can choose how you survive the cubicle combat zone. It’s impossible to guard your own personal work space when you’re not in the office, but with the Plug Coffee Mug, you’ll never have to worry about who is using your cup and putting their cubicle germs all up in your business. Now you don’t have to take your cup home for the day and potentially forget it the next day! Finally, there is an office coffee mug that can only be used by the person who holds the safety valve.

The Plug Mug is simple, yet practical – when you’re done at the office for the day, simply wash out your cup and remove the rubber stopper mug valve. Then just leave your coffee mug at your own desk, out in the open for all the office to see. This way, when some jerk your supervisor decides to take the coffee mug off of your desk when you are gone, they will see the hole in the side of their cup and put your cup back on your desk. Or (if your lucky) they won’t notice and by the time they try to fill up your coffee mug they will learn a lesson the hard way – and spill hot coffee all over their own boss! Who knows? Maybe you were the next one in line for his job! So not only did you just protect your own mug – you just got promoted – just for buying a coffee cup!