I have one almost identical to the Frieling (but I think it's branded Paderno) for home use. I agree it is bombproof. I don't use it in the van as it's quite heavy. In the van, I use a Jetboil
with a French press - boil and brew all in one, and it is very light and stores easily.
To the OP, I would be hesitant to get a glass one for use on the road. There are many Lexan French press options out there (with neoprene sleeves), such as the ones Scalf77 posted, and probably much cheaper than $45.