I’ll go first.
Winner:
Breaking Bad, season 3 episode 10, “Fly”
Honorable mention:
Community, season 3 episode 10, “Cooperative Calligraphy”
PS: I’m having a hard time categorizing these as real bottle episodes since they don’t feel cheap or “fillery” at all, but they are at least spatially and plot wise confined.


Thanks! I was wondering too.
Alternative tvtropes link, since that’s where I thought to look: https://tvtropes.org/pmwiki/pmwiki.php/Main/BottleEpisode
Nooooo! You just caused me another hour lost at that site!
That site is an SCP cognitohazard