2.1: I notice the cigarillos diameter now is slightly bigger, I enlarge the bore to 10.2 mm.

2.0: The thread is upgraded to bottle neck finish (38-400, ASTM D2911/D2911M-16)

A center bore for one match, you can add a match striker paper for convenience.

Note: tight fit, I may change the cap to other shape for easy open (or just buy 38-400 cap)

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1.0: The cap doesn't have a fillet, so it's a bit hard to screw in. My next step will be adding a place for matches or attaching a lighter case (for BIC).

Feel free to modify :)