If you're one of those people who refuses to drink tea or coffee unless it's at an optimum temperature, then you should probably should consider an insulated mug: for the good of yourself, of the environment and of the other people in the office who make you all these cups of tea that you BARELY drink because it's too hot to start with and then too cold.
I actually like cold coffee, but then I'm kind of weird like that.
Anyway. One such insulated mug is the Brugo Mug, a brightly coloured, double-insulated plastic mug that has a screw-on lid with one of those little sucky holes. It has a tip-and-sip thing which is supposed to protect you from the two extremes of hot and cold, by letting the hot stuff cool down a bit in a secondary chamber before you drink it, but preventing it from getting, you know, too cold.
It also works if you want to keep cold drinks cold, which is more likely in this hot summer weather.
They use PTZ technology. That means Perfect Temperature Zone technology - sounds pretty scientific to me. Anyway, we've been putting it to the test and it's quite nice to drink out of. It's grippable, drop-resistant and looks kind of sci-fi.
Though as ever - it comes down to how you feel about reusable sucky mugs and the fact that you can't put them in the dishwasher.
Brugo Mugs are £14.99 from Brugo