Open wide and say MERCURY POISONING! No, not really. As in don't put these in your mouth. Or your rectum. These are not medical thermometers, and they're not actually mercury. They're great for other stuff, though. And at $2.95, they're a bargain and a half!
These have both Celsius and Fahrenheit scales, and are marked for -18 to 110C and 0 to 230F.
Science class has never looked so elongated and fragile!