Fire Stick fire extinguishers? Anyone use them?

Has anyone experience of these? But I like the fact that they are small and light and you could stick one in a door pocket or in the glove compartment, and the have no residue. So no mess like powder or foam has..
From reading the bumf, a normal powder fire extinguisher lasts for about 25 seconds. Where as these come in 25, 50 second and 100 second sticks.

But they are dearer, a difference of about 25 quid versus 50 quid- ish, for 25 seconds .

https://www.youtube.com/watch?v=x4VABltwP1E

I’ve got one in both cars. Have yet to use one and hope I never have to if you know what I mean.
FYI these don’t have a UK kite mark

Yeah, got them in all the decent cars, £100 is bugger all compared to standing watching your pride and joy melt somewhere :D

Yeah true. Do you also carry a powder one, or just these fire sticks?