I think a Bic lighter would fit just fine but you would have to take it out before removing the Emberlit. The tabs on the Emberlit will get caught on the seam if you leave it in there because it bows the fabric out a little too much. Could make it a little wider at the top and that might not happen but the pouches fit both stoves very well.
A pouch for the CaribouBentSpokes Esbit holder would be a nice addition but I currently just through it in the pouch with the Emberlit.
One thing I noticed keeping the Esbit holder in the pouch is that the El-Mini is pretty easy to bend and that I need to watch how I pack it when there is something in the pouch that's not flat. I had my El-Mini bow a little after I put the holder in the pouch and it pressed against something in my pack. A little tweaking by hand fixed it right up but I imagine a lighter would be worse.
Fry: "I can't swallow that!"
Farnsworth: "Well then, good news! It's a suppository."