Let's start with the good. The product looks good and as always with IWOOT, it arrived really quickly too. Caused a few raised eyebrows and several smiles in the office, and our director thought it was brilliant.
Unfortunately, it just doesn't live up to the hype. Despite the massive size, capacity is quite low because of the double wall and taper. Probably holds a coffe-shop 'small' despite being the height of a 'large'.
The double-walled design and silicone lid are supposed to keep the drink warmer for longer and ensure the outside doesn't get hot. What actually happens is that there's a lot more mug for your drink to lose heat to, so the outside slowly becomes toasty warm, while your drink turns lukewarm. It's all because of the second law of thermodynamics, y'see.
The lid only has one hole in so you get a vacuum in the cup as you sip, is a pain to clean and makes the coffee all taste a bit silicone-y.
The big chunky porcelain means that it's near-impossible to judge how far away you are from needing to go back to the kettle too.
I'm really sorry to have to write this negative review, as I love the concept, but it's just not very practical in daily use.
