The first and most important question for me when I got these mugs was, do they work? They're rather pricey at about £20 for 2 full price.
The good news (from my scientific research) is yes! Using a cup of a similar size, both physically and in volume I measured the temperature from 200ml of water after 5 and 10 minutes. After 5 minutes, the water was 7c hotter in the bodum and 9c after 10 minutes, still just over 65c. It's worth noting that I didn't preheat either of the mugs, which would have kept it hotter for longer.
That out of the way, the mugs look great and feel just as good. The silicone stops heat from getting to your hands and also gives a good grip on your precious coffee!
If interested, the aeropress fits the top opening perfectly and the thermal heat retention proves usefully for methods of coffee brewing that take longer such as the chemex.