A bonus chest is a menu option that can be enabled by a player when creating a Minecraft world.
If the option is enabled at the time a Minecraft world is created, a bonus chest will generate within a few blocks of the default Spawn point the first time a player logs in. This is a single-block chest surrounded by a few Torches. The chest contains a variety of helpful items and supplies that a new player can make use of as they start exploring their world.
The chest and torches themselves are normal items. Like most other blocks, they can be dismantled by hitting them repeatedly, with or without the use of a tool, and added to a player's inventory for later use.