OK, so you might have seen this puzzle before but the chances are you've only ever tried to solve it in two-dimension Euclidean space (on a bit of paper). But topology is everything when it comes to the Utilities Problem. That's why we've printed it on a mug.
If you've tackled this one before you'll know it's very hard to solve (in fact, it's as hard as it's possible for something to be, if you catch my drift). But with a whiteboard marker (included) and a bit of graph theory (not included) you might have more luck with the mug.
The first person to post a video of them solving our mug (it must be one of our mugs!) wins a bunch of Maths Gear goodies. We already have a solution posted by Harry Lawrence. <SPOILER ALERT> Don't follow this link if you don't want to see the solution</SPOILER ALERT>:
The challenge by the way is to join all the houses to all the utilities without any of the nine lines crossing. Good luck!
The Utilities Mug has a high-quality durable glazed oxide finish (microwave and dishwasher safe) to ensure you can draw and erase as many times as you need. The mug is also capable of holding liquids, and some solids, of any temperature your body can handle.