I've located an old Bayer asprin metal box with sliding lid that I used to keep tiny star washers. I'm sure they don't make 'em any more. So the sliding lid problem is solved. Noe I have to drill 3 small holes on each side like the ESBIT Mizer box.
But for maximum efficiency I think the Gram Cracker is still the best bet. Maybe I can make one with a sliding top. More fun tinkerng in the garage.
WIFE: "Eric, what are you still doing in the garage? Are you EVER going to finish the yard work?"
ERIC: "Uh, yeah Luz, just a few more minutes. I'm in the verge of a great discovery."
Thanks for the mention of my ESBIT obsession being responsible for your interest in solid fuel tabs. Maybe someone will make a pressurized ESBIT stove for even more efficiency.
BTW, I was in Denmark last summer for 3 weeks. I visited Odense, my grandfather's home town. LOVE Denmark. 'Spensive but fun.