When the character has to take a bath inside a barrel or small oil drum that is usually outdoors and heated over a fire underneath. This is typically seen in poor rural environments out in the country. Despite the bath being too small to fit more than one person, Bathtub Bonding still can occur, but it's guaranteed to get cramped, making at least one of the bathers uncomfortable (though if you change it so that way one person is bathing and the other isn't, you can have a subverted version of the trope. Or you can avert it by making the drum big enough to accommodate two people). Outdoor Bath Peeping is another thing that is generally guaranteed. This is the only time a bathtub can be outside without it being considered an Awkwardly Placed Bathtub.
This setup is called a "Goemon-buro" (Goemon's Bath) in Japan, in (a somewhat morbid) reference to Ishikawa Goemon and how he was executed by being boiled alive.
- In the anime film Tenchi Muyo! In Love, Kiyone is seen in one just before being teleported out of it by Washu.
- In Dragon Ball Z, Goku commonly uses one as the default bathtub at his house. One notable moment is in The Tree of Might film when he bathes in it with Gohan.
- Seen in the fourth episode of Strike Witches 2. With two barrels right next to each other.
- Kaede and Negi share a barrel in an early chapter of Mahou Sensei Negima!.
- Nanako bathes in a barrel at the end of the second episode of Amazing Nurse Nanako.
- Near the end of Future Diary, Yukiteru and Yuno take a bath in a oil drum together.
- Zettai Karen Children: Mio bathes in one.
- In Arakawa Under the Bridge, it's the only kind of bath available to the bridge-dwellers. A Modesty Towel is recommended, in case the police come by.
- Seen often in Ranma ½, especially with Ryoga.
- Used on site by the cops in Patlabor (2nd OVA series). Until an accident with their propane cylinder, which leads to them going to a public bath, where a mad bomber is hiding.
- Cry-Baby: When we meet Johnny Depp's "drape" family, patriarch Iggy Pop is bathing in a little metal tub in the yard - he cheerfully exclaims "Ya caught me in my birthday suit!"
- In Forty Guns, the baths in Barney's Bathhouse are made from cut-down wooden barrels, although the bathhouse has wooden walls for some privacy.
- Chico and the Man: Ed Brown catches Chico bathing in a drum in the men's room of the garage.
- The ending of Mega Man 9 shows Dr. Light bathing in a barrel, with a reformed Magma Man providing the heat.
- The bath of the default house in Azure Dreams.
- Lost in Blue 3 has the ability to make a bath out of an oil drum to increase relationship values with other survivors.
- Megadimension Neptunia VII has Neptune, Nepgear, and Uzume Tennouboushi (later, BigNep) sharing a drum bath.
- Travelers in Tomodachi Life will bathe in steel drums if given a bath set.