Another model that helps me stay organised, is my TS100 Soldering Iron Tip holder. It's a 1x1 #Gridfinity unit that holds 4 tips. The tolerances are good (printed on my P1P) and the tips fit snugly into the holes.

I've displayed them pointy side up, because we like to impale ourselves on sharp things in the workshop.

There are models out there already which include the soldering iron itself, but mine is always in use, so just wanted somewhere for the tips.