"It seems that what we really need instead of trying to adapt to the Jetboil cup is a standalone 600mL heat exhanger mug/pot with a base designed to sit directly on regular stove pot supports"
I checked my stash of pots and I have an Outbound Denali hard anodized HE pot that seems to almost fit the spec.
It's almost identical to the Optimus HE pot, but without the pouring spout; probably from the same OEM.
It's listed as a 900 ml pot, has graduated marks to 800 ml.
Probably wouldn't put more than 700 ml or it'll boil over.
The pot supports of the BRS-3000t fit perfectly on the HE base, leaving approx 1 1/4" clearance between the base of the pot and the top of the burner.



