It's the Bear Bones Ti-Mag Windshields from a bloke in Mid Wales for less than a tenner
https://www.bearbonesbikepacking.co.uk/ ... ndshields/
It's 2 magnets clip onto the gas cylinder and shields half of the the small burner from the wind brilliantly.

It fit's perfectly into a 750ml Ti mug along with the gas, Kraku burner, lighter and spork with a little room to spare.


Although it's a little tall for a 650ml Ti mug if you want to fit the lid on it

But I'm sure it could be cut down a little without much ill effect.
Why has no one thought of this before?