There's a reason takeaway coffee cups have that ribbed sleeve wrapped around them: it stops your hand from burning, and gives you something to actually grip. Good design, we just never notice it, because the cup's gone in five minutes.
The Sengetti Ribbed Coffee Mug borrows that exact shape on purpose. The ribbed silicone sleeve gives you the same instant, familiar grip as the cup you'd get handed at a coffee counter. The difference is what happens after the coffee's finished: this one goes back on your desk, not in a bin.
The same good idea, just not thrown away this time
Whoever figured out that a ribbed sleeve makes a hot cup easier to hold solved a real problem. Putting that same idea onto something permanent isn't a gimmick, it's a registered design that follows the original thinking all the way through, instead of stopping at five minutes.

Underneath, it's a proper ceramic coffee mug
Take the silicone sleeve off (it comes away cleanly for washing) and there's genuine high-spec ceramic underneath, not a stand-in. This is a real ceramic coffee mug first, double-walled for thermal insulation so drinks stay hot or cold longer, with a detachable lid for whenever it needs to travel. Dishwasher and microwave safe, lid off.

Five colours, one mug
This ceramic coffee mug is also part of our Choose Your Skin range, five silicone sleeve colours to choose from, so it doesn't have to look like everyone else's. For retail orders, it's 10% off with code SKIN10, running through the end of September.
Quick questions we get asked
Is the ribbed sleeve actually removable? Yes, it comes off the ceramic mug for cleaning, and Andy Cartwright recommends washing them separately for the best result.
Is it dishwasher and microwave safe? Yes, with the lid removed.
What's the capacity? 320ml.
Have a look at the mug and the full colour range: Choose Your Skin