Another Relic?

Can you still buy these old mercury thermometers? 
Probably not, which is a pity. I've managed to convert my thinking from fahrenheit to centigrade but I'm not much good with the new digital gadgets. 
I tried to use Helen's on one of the twins recently and it must just have had a flat battery because they are still alive.
Thanks KangaZu for hosting Tiny Tuesday this month.