Perkolating Coffee Cap

Update v5: added a quick hole all the way to the handle, to more match real lids like this. will keep the original files in-case anybody wants the version w/o the hole in the center, for whatever reason.

this was a quick (30min) design of a cap for a coffee perkolator.
the original was just a metal cap, and the instructions referenced a see-thru cap for timing how long to let the coffee perk, needless to say, that won't be as easy with an all-metal cap.

the cap is 4" round for the inner r