Containers are anything on a map you can inspect for semi-random loot (unlike seeing a wood plank which is always a wood plank). While some containers are unique, many are found on various maps and often contains semi-specific loot.
You can find locations for each container on their respective pages.
|Guitar case||Average||Contains various intruments|
|Gun bag||Average||Guns and bows|
|Locker||Average||Sometimes||Items for common resources (plastic, wood, metal), some items for rare resources (precious ore), beverages and pastries|
|Safe / Wall safe||High||Often||Swords, guns, alcohol, rarer items.|
|Sword case||Average||Sometimes||Various bladed weapons, including the more valuable swords.|
|Vending machine||Average||Beverages and pastries|
|Fish tank||Various fish|