pity the nescafe ones didn't take off...they were really useful especially if you were stuck somewhere cold unexpectedly weather like this we used to keep a few in the car...
tesco sell an espresso cup self heating,(or did) i 'm an espresso fan and it's not bad but its it bit above what costa charge for one in a coffee bar price wise
I imagain them to be expensive, but even if you just purchase a couple to keep in the car for emergencies especially this time of year, i will have a look in Tesco. Thanks again.