When i opened the thermometer it went straight to the ground and broke in half.
I finally picked up a new thermometer as the one I've been using for years developed a bubble in the red dye and made the readings slightly off. I'm not scared of this breaking during normal use on brew day. My only complaint would be that the small white cap cracked during the first use.
It is glass and delicate. I only use it for calibrating my 6" and 12" metal thermometers.
I have a couple of these alcohol thermometers around for calibration of my dial thermometers on my kettle and mash tun. Don't be like me and try to use these for day to day brewing....you will break it, bits of glass will fall into your mash or into your kettle, you'll have an internal debate reguarding the possibility of glass bits in your beer, how well can I really filter this beer, will all the glass settle out with the trub? Just use it to calibrate other thermometers and you will treasure it for years.